Changes HashMap to use aHash instead, giving a performance boost. (#9391)

# Description

see https://github.com/nushell/nushell/issues/9390
using `ahash` instead of the default hasher. this will not affect
compile time as we where already building `ahash`.


# User-Facing Changes
<!-- List of all changes that impact the user experience here. This
helps us keep track of breaking changes. -->

# Tests + Formatting
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- `cargo fmt --all -- --check` to check standard code formatting (`cargo
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Cargo.lock

@@ -2666,6 +2666,7 @@ dependencies = [
 name = "nu-cli"
 version = "0.81.1"
 dependencies = [
+ "ahash 0.8.3",
  "atty",
  "chrono",
  "crossterm 0.26.1",
@@ -2695,6 +2696,7 @@ dependencies = [
 name = "nu-cmd-dataframe"
 version = "0.81.1"
 dependencies = [
+ "ahash 0.8.3",
  "chrono",
  "fancy-regex",
  "indexmap",
@@ -2713,6 +2715,7 @@ dependencies = [
 name = "nu-cmd-extra"
 version = "0.81.1"
 dependencies = [
+ "ahash 0.8.3",
  "nu-cmd-lang",
  "nu-engine",
  "nu-parser",
@@ -2725,6 +2728,7 @@ dependencies = [
 name = "nu-cmd-lang"
 version = "0.81.1"
 dependencies = [
+ "ahash 0.8.3",
  "fancy-regex",
  "itertools",
  "nu-ansi-term",
@@ -2740,6 +2744,7 @@ dependencies = [
 name = "nu-color-config"
 version = "0.81.1"
 dependencies = [
+ "ahash 0.8.3",
  "nu-ansi-term",
  "nu-engine",
  "nu-json",
@@ -2754,6 +2759,7 @@ name = "nu-command"
 version = "0.81.1"
 dependencies = [
  "Inflector",
+ "ahash 0.8.3",
  "alphanumeric-sort",
  "atty",
  "base64 0.21.2",
@@ -2856,6 +2862,7 @@ dependencies = [
 name = "nu-engine"
 version = "0.81.1"
 dependencies = [
+ "ahash 0.8.3",
  "nu-glob",
  "nu-path",
  "nu-protocol",
@@ -2867,6 +2874,7 @@ dependencies = [
 name = "nu-explore"
 version = "0.81.1"
 dependencies = [
+ "ahash 0.8.3",
  "ansi-str",
  "crossterm 0.26.1",
  "lscolors",
@@ -2903,6 +2911,7 @@ dependencies = [
 name = "nu-parser"
 version = "0.81.1"
 dependencies = [
+ "ahash 0.8.3",
  "bytesize",
  "chrono",
  "itertools",
@@ -2928,6 +2937,7 @@ dependencies = [
 name = "nu-plugin"
 version = "0.81.1"
 dependencies = [
+ "ahash 0.8.3",
  "bincode",
  "nu-engine",
  "nu-protocol",
@@ -2949,6 +2959,7 @@ dependencies = [
 name = "nu-protocol"
 version = "0.81.1"
 dependencies = [
+ "ahash 0.8.3",
  "byte-unit",
  "chrono",
  "chrono-humanize",
@@ -2981,6 +2992,7 @@ dependencies = [
 name = "nu-system"
 version = "0.81.1"
 dependencies = [
+ "ahash 0.8.3",
  "atty",
  "chrono",
  "libc",
@@ -2998,6 +3010,7 @@ dependencies = [
 name = "nu-table"
 version = "0.81.1"
 dependencies = [
+ "ahash 0.8.3",
  "nu-ansi-term",
  "nu-color-config",
  "nu-engine",
@@ -3092,6 +3105,7 @@ dependencies = [
 name = "nu_plugin_query"
 version = "0.81.1"
 dependencies = [
+ "ahash 0.8.3",
  "gjson",
  "nu-engine",
  "nu-plugin",

crates/nu-cli/Cargo.toml

@@ -37,6 +37,7 @@ once_cell = "1.17"
 percent-encoding = "2"
 sysinfo = "0.29"
 unicode-segmentation = "1.10"
+ahash = "0.8.3"
 
 [features]
 plugin = []

crates/nu-cli/src/completions/custom_completions.rs

@@ -1,4 +1,5 @@
 use crate::completions::{Completer, CompletionOptions, MatchAlgorithm, SortBy};
+use ahash::{HashMap, HashMapExt};
 use nu_engine::eval_call;
 use nu_protocol::{
     ast::{Argument, Call, Expr, Expression},
@@ -6,7 +7,7 @@ use nu_protocol::{
     PipelineData, Span, Type, Value,
 };
 use reedline::Suggestion;
-use std::{collections::HashMap, sync::Arc};
+use std::sync::Arc;
 
 use super::completer::map_value_completions;
 

crates/nu-cmd-dataframe/Cargo.toml

@@ -28,6 +28,7 @@ indexmap = { version = "1.7", features = ["serde-1"] }
 num = { version = "0.4", optional = true }
 serde = { version = "1.0", features = ["derive"] }
 sqlparser = { version = "0.33", features = ["serde"], optional = true }
+ahash = "0.8.3"
 
 [dependencies.polars]
 features = [

crates/nu-cmd-dataframe/src/dataframe/eager/sql_context.rs

@@ -1,4 +1,5 @@
 use crate::dataframe::eager::sql_expr::parse_sql_expr;
+use ahash::{HashMap, HashMapExt};
 use polars::error::{ErrString, PolarsError};
 use polars::prelude::{col, DataFrame, DataType, IntoLazy, LazyFrame};
 use sqlparser::ast::{
@@ -6,7 +7,6 @@ use sqlparser::ast::{
 };
 use sqlparser::dialect::GenericDialect;
 use sqlparser::parser::Parser;
-use std::collections::HashMap;
 
 #[derive(Default)]
 pub struct SQLContext {

crates/nu-cmd-extra/Cargo.toml

@@ -20,6 +20,7 @@ nu-protocol = { path = "../nu-protocol", version = "0.81.1" }
 
 # Potential dependencies for extras
 num-traits = "0.2"
+ahash = "0.8.3"
 
 [features]
 extra = ["default"]

crates/nu-cmd-extra/src/example_test.rs

@@ -15,11 +15,11 @@ mod test_examples {
         check_example_input_and_output_types_match_command_signature,
     };
 
+    use ahash::{HashSet, HashSetExt};
     use nu_protocol::{
         engine::{Command, EngineState, StateWorkingSet},
         Type,
     };
-    use std::collections::HashSet;
 
     pub fn test_examples(cmd: impl Command + 'static) {
         let examples = cmd.examples();

crates/nu-cmd-lang/Cargo.toml

@@ -22,6 +22,7 @@ nu-ansi-term = "0.47.0"
 fancy-regex = "0.11"
 itertools = "0.10"
 shadow-rs = { version = "0.22", default-features = false }
+ahash = "0.8.3"
 
 [build-dependencies]
 shadow-rs = { version = "0.22", default-features = false }

crates/nu-cmd-lang/src/example_support.rs

@@ -1,10 +1,10 @@
+use ahash::{HashSet, HashSetExt};
 use itertools::Itertools;
 use nu_protocol::{
     ast::Block,
     engine::{EngineState, Stack, StateDelta, StateWorkingSet},
     Example, PipelineData, Signature, Span, Type, Value,
 };
-use std::collections::HashSet;
 
 pub fn check_example_input_and_output_types_match_command_signature(
     example: &Example,

crates/nu-cmd-lang/src/example_test.rs

@@ -16,11 +16,11 @@ mod test_examples {
     use crate::{
         Break, Collect, Def, Describe, Echo, ExportCommand, ExportDef, If, Let, Module, Mut, Use,
     };
+    use ahash::{HashSet, HashSetExt};
     use nu_protocol::{
         engine::{Command, EngineState, StateWorkingSet},
         Type, Value,
     };
-    use std::collections::HashSet;
 
     pub fn test_examples(cmd: impl Command + 'static) {
         let examples = cmd.examples();

crates/nu-color-config/Cargo.toml

@@ -18,6 +18,7 @@ nu-engine = { path = "../nu-engine", version = "0.81.1" }
 nu-json = { path="../nu-json", version = "0.81.1"  }
 
 serde = { version="1.0", features=["derive"] }
+ahash = "0.8.3"
 
 [dev-dependencies]
 nu-test-support = { path="../nu-test-support", version = "0.81.1"  }

crates/nu-color-config/src/color_config.rs

@@ -2,9 +2,9 @@ use crate::{
     nu_style::{color_from_hex, lookup_style},
     parse_nustyle, NuStyle,
 };
+use ahash::{HashMap, HashMapExt};
 use nu_ansi_term::Style;
 use nu_protocol::Value;
-use std::collections::HashMap;
 
 pub fn lookup_ansi_color_style(s: &str) -> Style {
     if s.starts_with('#') {

crates/nu-color-config/src/style_computer.rs

@@ -1,5 +1,6 @@
 use crate::text_style::Alignment;
 use crate::{color_record_to_nustyle, lookup_ansi_color_style, TextStyle};
+use ahash::HashMap;
 use nu_ansi_term::{Color, Style};
 use nu_engine::{env::get_config, eval_block};
 use nu_protocol::{
@@ -7,10 +8,7 @@ use nu_protocol::{
     CliError, IntoPipelineData, Value,
 };
 
-use std::{
+use std::fmt::{Debug, Formatter, Result};
-    collections::HashMap,
-    fmt::{Debug, Formatter, Result},
-};
 
 // ComputableStyle represents the valid user style types: a single color value, or a closure which
 // takes an input value and produces a color value. The latter represents a value which
@@ -142,7 +140,7 @@ impl<'a> StyleComputer<'a> {
 
         // Create the hashmap
         #[rustfmt::skip]
-        let mut map: StyleMapping = HashMap::from([
+        let mut map: StyleMapping = [
             ("separator".to_string(), ComputableStyle::Static(Color::White.normal())),
             ("leading_trailing_space_bg".to_string(), ComputableStyle::Static(Style::default().on(Color::Rgb(128, 128, 128)))),
             ("header".to_string(), ComputableStyle::Static(Color::White.normal())),
@@ -164,7 +162,7 @@ impl<'a> StyleComputer<'a> {
             ("block".to_string(), ComputableStyle::Static(Color::White.normal())),
             ("hints".to_string(), ComputableStyle::Static(Color::DarkGray.normal())),
             ("search_result".to_string(), ComputableStyle::Static(Color::White.normal().on(Color::Red))),
-        ]);
+        ].into_iter().collect();
 
         for (key, value) in &config.color_config {
             match value {
@@ -216,10 +214,12 @@ fn test_computable_style_static() {
     let style_computer = StyleComputer::new(
         &dummy_engine_state,
         &dummy_stack,
-        HashMap::from([
+        [
             ("string".into(), ComputableStyle::Static(style1)),
             ("row_index".into(), ComputableStyle::Static(style2)),
-        ]),
+        ]
+        .into_iter()
+        .collect(),
     );
     assert_eq!(
         style_computer.compute("string", &Value::nothing(Span::unknown())),

crates/nu-command/Cargo.toml

@@ -32,6 +32,7 @@ nu-utils = { path = "../nu-utils", version = "0.81.1" }
 nu-ansi-term = "0.47.0"
 
 alphanumeric-sort = "1.5"
+ahash = "0.8.3"
 atty = "0.2"
 base64 = "0.21"
 byteorder = "1.4"

crates/nu-command/src/charting/hashable_value.rs

@@ -159,8 +159,8 @@ impl PartialEq for HashableValue {
 #[cfg(test)]
 mod test {
     use super::*;
+    use ahash::{HashMap, HashMapExt, HashSet, HashSetExt};
     use nu_protocol::ast::{CellPath, PathMember};
-    use std::collections::{HashMap, HashSet};
 
     #[test]
     fn from_value() {

crates/nu-command/src/charting/histogram.rs

@@ -1,4 +1,5 @@
 use super::hashable_value::HashableValue;
+use ahash::{HashMap, HashMapExt};
 use itertools::Itertools;
 use nu_engine::CallExt;
 use nu_protocol::ast::Call;
@@ -7,7 +8,6 @@ use nu_protocol::{
     Example, IntoPipelineData, PipelineData, ShellError, Signature, Span, Spanned, SyntaxShape,
     Type, Value,
 };
-use std::collections::HashMap;
 use std::iter;
 
 #[derive(Clone)]

crates/nu-command/src/deprecated/deprecated_commands.rs

@@ -1,11 +1,11 @@
-use std::collections::HashMap;
+use ahash::HashMap;
 
 /// Return map of <deprecated_command_name, new_command_name>
 /// This covers simple deprecated commands nicely, but it's not great for deprecating
 /// subcommands like `foo bar` where `foo` is still a valid command.
 /// For those, it's currently easiest to have a "stub" command that just returns an error.
 pub fn deprecated_commands() -> HashMap<String, String> {
-    HashMap::from([
+    [
         ("keep".to_string(), "take".to_string()),
         ("match".to_string(), "find".to_string()),
         ("nth".to_string(), "select".to_string()),
@@ -25,5 +25,7 @@ pub fn deprecated_commands() -> HashMap<String, String> {
         ("benchmark".to_string(), "timeit".to_string()),
         ("str collect".to_string(), "str join".to_string()),
         ("old-alias".to_string(), "alias".to_string()),
-    ])
+    ]
+    .into_iter()
+    .collect()
 }

crates/nu-command/src/env/config/utils.rs

@@ -1,4 +1,5 @@
-use std::{collections::HashMap, path::PathBuf};
+use ahash::HashMap;
+use std::path::PathBuf;
 
 use nu_protocol::{
     engine::{EngineState, Stack},

crates/nu-command/src/env/with_env.rs

@@ -1,4 +1,4 @@
-use std::collections::HashMap;
+use ahash::{HashMap, HashMapExt};
 
 use nu_engine::{eval_block, CallExt};
 use nu_protocol::{

crates/nu-command/src/example_test.rs

@@ -14,6 +14,7 @@ mod test_examples {
         SplitRow, Str, StrJoin, StrLength, StrReplace, Update, Url, Values, Wrap,
     };
     use crate::{Each, To};
+    use ahash::{HashSet, HashSetExt};
     use nu_cmd_lang::example_support::{
         check_all_signature_input_output_types_entries_have_examples,
         check_example_evaluates_to_expected_output,
@@ -24,7 +25,6 @@ mod test_examples {
         engine::{Command, EngineState, StateWorkingSet},
         Type,
     };
-    use std::collections::HashSet;
 
     pub fn test_examples(cmd: impl Command + 'static) {
         let examples = cmd.examples();

crates/nu-command/src/filesystem/rm.rs

@@ -1,4 +1,4 @@
-use std::collections::HashMap;
+use ahash::{HashMap, HashMapExt};
 #[cfg(all(
     feature = "trash-support",
     not(target_os = "android"),

crates/nu-command/src/filters/join.rs

@@ -1,3 +1,4 @@
+use ahash::{HashMap, HashMapExt, HashSet, HashSetExt};
 use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
@@ -5,7 +6,6 @@ use nu_protocol::{
     Config, Example, PipelineData, ShellError, Signature, Span, SyntaxShape, Type, Value,
 };
 use std::cmp::max;
-use std::collections::{HashMap, HashSet};
 
 #[derive(Clone)]
 pub struct Join;

crates/nu-command/src/filters/select.rs

@@ -1,3 +1,4 @@
+use ahash::{HashSet, HashSetExt};
 use nu_engine::CallExt;
 use nu_protocol::ast::{Call, CellPath, PathMember};
 use nu_protocol::engine::{Command, EngineState, Stack};
@@ -5,7 +6,6 @@ use nu_protocol::{
     Category, Example, IntoInterruptiblePipelineData, IntoPipelineData, PipelineData,
     PipelineIterator, ShellError, Signature, Span, SyntaxShape, Type, Value,
 };
-use std::collections::HashSet;
 
 #[derive(Clone)]
 pub struct Select;

crates/nu-command/src/filters/uniq.rs

@@ -1,4 +1,5 @@
 use crate::formats::value_to_string;
+use ahash::{HashMap, HashMapExt};
 use itertools::Itertools;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
@@ -7,7 +8,6 @@ use nu_protocol::{
     Span, Type, Value,
 };
 use std::collections::hash_map::IntoIter;
-use std::collections::HashMap;
 
 #[derive(Clone)]
 pub struct Uniq;

crates/nu-command/src/filters/update_cells.rs

@@ -1,3 +1,4 @@
+use ahash::HashSet;
 use nu_engine::{eval_block, CallExt};
 use nu_protocol::ast::{Block, Call};
 use nu_protocol::engine::{Closure, Command, EngineState, Stack};
@@ -5,7 +6,6 @@ use nu_protocol::{
     Category, Example, IntoInterruptiblePipelineData, IntoPipelineData, PipelineData,
     PipelineIterator, ShellError, Signature, Span, SyntaxShape, Type, Value,
 };
-use std::collections::HashSet;
 use std::iter::FromIterator;
 
 #[derive(Clone)]

crates/nu-command/src/formats/to/html.rs

@@ -1,4 +1,5 @@
 use crate::formats::to::delimited::merge_descriptors;
+use ahash::{HashMap, HashMapExt};
 use fancy_regex::Regex;
 use nu_engine::CallExt;
 use nu_protocol::ast::Call;
@@ -9,7 +10,6 @@ use nu_protocol::{
 };
 use rust_embed::RustEmbed;
 use serde::{Deserialize, Serialize};
-use std::collections::HashMap;
 use std::error::Error;
 use std::fmt::Write;
 

crates/nu-command/src/math/mode.rs

@@ -1,4 +1,5 @@
 use crate::math::utils::run_with_function;
+use ahash::{HashMap, HashMapExt};
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{Category, Example, PipelineData, ShellError, Signature, Span, Type, Value};
@@ -142,7 +143,7 @@ pub fn mode(values: &[Value], _span: Span, head: &Span) -> Result<Value, ShellEr
         })
         .collect::<Result<Vec<HashableType>, ShellError>>()?;
 
-    let mut frequency_map = std::collections::HashMap::new();
+    let mut frequency_map = HashMap::new();
     for v in hashable_values {
         let counter = frequency_map.entry(v).or_insert(0);
         *counter += 1;

crates/nu-command/src/network/http/client.rs

@@ -9,7 +9,7 @@ use nu_protocol::{
 };
 use ureq::{Error, ErrorKind, Request, Response};
 
-use std::collections::HashMap;
+use ahash::{HashMap, HashMapExt};
 use std::io::BufReader;
 use std::path::PathBuf;
 use std::str::FromStr;

crates/nu-command/src/path/join.rs

@@ -1,7 +1,5 @@
-use std::{
+use ahash::HashMap;
-    collections::HashMap,
+use std::path::{Path, PathBuf};
-    path::{Path, PathBuf},
-};
 
 use nu_engine::CallExt;
 use nu_protocol::ast::Call;

crates/nu-command/src/platform/ansi/ansi_.rs

@@ -1,3 +1,4 @@
+use ahash::{HashMap, HashMapExt};
 use nu_ansi_term::*;
 use nu_engine::CallExt;
 use nu_protocol::engine::{EngineState, Stack};
@@ -6,7 +7,6 @@ use nu_protocol::{
     PipelineData, ShellError, Signature, Span, SyntaxShape, Type, Value,
 };
 use once_cell::sync::Lazy;
-use std::collections::HashMap;
 
 #[derive(Clone)]
 pub struct AnsiCommand;

crates/nu-command/src/system/run_external.rs

@@ -1,4 +1,5 @@
 use crate::hook::eval_hook;
+use ahash::HashMap;
 use nu_engine::env_to_strings;
 use nu_engine::CallExt;
 use nu_protocol::{
@@ -11,7 +12,6 @@ use nu_protocol::{
 use nu_system::ForegroundProcess;
 use os_pipe::PipeReader;
 use pathdiff::diff_paths;
-use std::collections::HashMap;
 use std::io::{BufRead, BufReader, Read, Write};
 use std::path::{Path, PathBuf};
 use std::process::{Command as CommandSys, Stdio};

crates/nu-command/src/viewers/explore.rs

@@ -1,3 +1,4 @@
+use ahash::HashMap;
 use nu_ansi_term::{Color, Style};
 use nu_color_config::{get_color_map, StyleComputer};
 use nu_engine::CallExt;
@@ -11,7 +12,6 @@ use nu_protocol::{
     engine::{Command, EngineState, Stack},
     Category, Example, PipelineData, ShellError, Signature, Span, SyntaxShape, Type, Value,
 };
-use std::collections::HashMap;
 
 /// A `less` like program to render a [Value] as a table.
 #[derive(Clone)]

crates/nu-command/src/viewers/icons.rs

@@ -1,6 +1,6 @@
+use ahash::HashMap;
 use nu_protocol::{ShellError, Span};
 use once_cell::sync::Lazy;
-use std::collections::HashMap;
 use std::path::Path;
 
 // Attribution: Thanks exa. Most of this file is taken from around here
@@ -86,7 +86,7 @@ impl Icons {
 // }
 
 static MAP_BY_NAME: Lazy<HashMap<&'static str, char>> = Lazy::new(|| {
-    HashMap::from([
+    [
         (".Trash", '\u{f1f8}'),             // 
         (".atom", '\u{e764}'),              // 
         (".bashprofile", '\u{e615}'),       // 
@@ -124,7 +124,9 @@ static MAP_BY_NAME: Lazy<HashMap<&'static str, char>> = Lazy::new(|| {
         ("npmignore", '\u{e71e}'),          // 
         ("rubydoc", '\u{e73b}'),            // 
         ("yarn.lock", '\u{e718}'),          // 
-    ])
+    ]
+    .into_iter()
+    .collect()
 });
 
 pub fn icon_for_file(file_path: &Path, span: Span) -> Result<char, ShellError> {

crates/nu-engine/Cargo.toml

@@ -17,6 +17,7 @@ nu-glob = { path = "../nu-glob", version = "0.81.1" }
 nu-utils = { path = "../nu-utils", version = "0.81.1"  }
 
 sysinfo ="0.29"
+ahash = "0.8.3"
 
 [features]
 plugin = []

crates/nu-engine/src/column.rs

@@ -1,5 +1,5 @@
+use ahash::HashSet;
 use nu_protocol::Value;
-use std::collections::HashSet;
 
 pub fn get_columns(input: &[Value]) -> Vec<String> {
     let mut columns = vec![];

crates/nu-engine/src/env.rs

@@ -1,4 +1,4 @@
-use std::collections::HashMap;
+use ahash::{HashMap, HashMapExt};
 use std::path::{Path, PathBuf};
 
 use nu_protocol::ast::{Call, Expr, PathMember};

crates/nu-engine/src/eval.rs

@@ -1,4 +1,5 @@
 use crate::{current_dir_str, get_full_help, nu_variable::NuVariable};
+use ahash::{HashMap, HashMapExt};
 use nu_path::expand_path_with;
 use nu_protocol::{
     ast::{
@@ -9,7 +10,6 @@ use nu_protocol::{
     DataSource, IntoInterruptiblePipelineData, IntoPipelineData, PipelineData, PipelineMetadata,
     Range, ShellError, Span, Spanned, Unit, Value, VarId, ENV_VARIABLE_ID,
 };
-use std::collections::HashMap;
 use std::time::Instant;
 
 pub fn eval_operator(op: &Expression) -> Result<Operator, ShellError> {

crates/nu-engine/src/scope.rs

@@ -1,10 +1,10 @@
+use ahash::{HashMap, HashMapExt};
 use nu_protocol::{
     engine::{Command, EngineState, Stack, Visibility},
     ShellError, Signature, Span, SyntaxShape, Type, Value,
 };
 use std::borrow::Borrow;
 use std::cmp::Ordering;
-use std::collections::HashMap;
 
 pub fn create_scope(
     engine_state: &EngineState,

crates/nu-explore/Cargo.toml

@@ -25,4 +25,5 @@ strip-ansi-escapes = "0.1"
 crossterm = "0.26"
 ratatui = "0.20"
 ansi-str = "0.7"
+ahash = "0.8.3"
 lscolors = { version = "0.14", default-features = false, features = ["nu-ansi-term"] }

crates/nu-explore/src/commands/config_show.rs

@@ -1,10 +1,10 @@
-use std::{collections::HashMap, io::Result};
+use ahash::HashMap;
-
 use nu_protocol::{
     engine::{EngineState, Stack},
     Value,
 };
 use ratatui::layout::Rect;
+use std::io::Result;
 
 use crate::{
     nu_common::{try_build_table, NuSpan},

crates/nu-explore/src/commands/help.rs

@@ -1,7 +1,5 @@
-use std::{
+use ahash::{HashMap, HashMapExt};
-    collections::HashMap,
+use std::io::{self, Result};
-    io::{self, Result},
-};
 
 use crossterm::event::KeyEvent;
 use nu_protocol::{

crates/nu-explore/src/nu_common/value.rs

@@ -1,4 +1,4 @@
-use std::collections::HashMap;
+use ahash::{HashMap, HashMapExt};
 
 use nu_engine::get_columns;
 use nu_protocol::{ast::PathMember, ListStream, PipelineData, PipelineMetadata, RawStream, Value};

crates/nu-explore/src/pager/mod.rs

@@ -5,11 +5,12 @@ mod status_bar;
 
 use std::{
     cmp::min,
-    collections::HashMap,
     io::{self, Result, Stdout},
     sync::atomic::Ordering,
 };
 
+use ahash::{HashMap, HashMapExt};
+
 use crossterm::{
     event::{KeyCode, KeyEvent, KeyModifiers},
     execute,

crates/nu-explore/src/registry/mod.rs

@@ -1,11 +1,11 @@
 mod command;
 
-use std::{borrow::Cow, collections::HashMap};
-
 use crate::{
     commands::{SimpleCommand, ViewCommand},
     views::View,
 };
+use ahash::HashMap;
+use std::borrow::Cow;
 
 pub use command::Command;
 

crates/nu-explore/src/views/record/mod.rs

@@ -1,6 +1,8 @@
 mod tablew;
 
-use std::{borrow::Cow, collections::HashMap};
+use std::borrow::Cow;
+
+use ahash::{HashMap, HashMapExt};
 
 use crossterm::event::{KeyCode, KeyEvent};
 use nu_color_config::{get_color_map, StyleComputer};

crates/nu-parser/Cargo.toml

@@ -21,6 +21,7 @@ chrono = { default-features = false, features = ['std'], version = "0.4" }
 itertools = "0.10"
 log = "0.4"
 serde_json = "1.0"
+ahash = "0.8.3"
 
 [dev-dependencies]
 rstest = { version = "0.17", default-features = false }

crates/nu-parser/src/parse_keywords.rs

@@ -1,4 +1,5 @@
 use crate::parser_path::ParserPath;
+use ahash::{HashMap, HashMapExt, HashSet, HashSetExt};
 use itertools::Itertools;
 use log::trace;
 use nu_path::canonicalize_with;
@@ -11,7 +12,6 @@ use nu_protocol::{
     span, Alias, BlockId, Exportable, Module, ModuleId, ParseError, PositionalArg,
     ResolvedImportPattern, Span, Spanned, SyntaxShape, Type, VarId,
 };
-use std::collections::{HashMap, HashSet};
 use std::ffi::OsStr;
 use std::path::{Path, PathBuf};
 

crates/nu-parser/src/parser.rs

@@ -27,13 +27,10 @@ use crate::parse_keywords::{
     parse_use, parse_where, parse_where_expr, LIB_DIRS_VAR,
 };
 
+use ahash::{HashMap, HashMapExt, HashSet, HashSetExt};
 use itertools::Itertools;
 use log::trace;
-use std::{
+use std::{num::ParseIntError, str};
-    collections::{HashMap, HashSet},
-    num::ParseIntError,
-    str,
-};
 
 #[cfg(feature = "plugin")]
 use crate::parse_keywords::parse_register;

crates/nu-plugin/Cargo.toml

@@ -18,3 +18,4 @@ bincode = "1.3"
 rmp-serde = "1.1"
 serde = { version = "1.0" }
 serde_json = { version = "1.0"}
+ahash = "0.8.3"

crates/nu-plugin/src/plugin/mod.rs

@@ -1,7 +1,7 @@
 mod declaration;
+use ahash::HashMap;
 pub use declaration::PluginDeclaration;
 use nu_engine::documentation::get_flags_section;
-use std::collections::HashMap;
 
 use crate::protocol::{CallInput, LabeledError, PluginCall, PluginData, PluginResponse};
 use crate::EncodingType;

crates/nu-protocol/Cargo.toml

@@ -29,6 +29,7 @@ strum = "0.24"
 strum_macros = "0.24"
 thiserror = "1.0"
 typetag = "0.2"
+ahash = "0.8.3"
 
 [features]
 plugin = ["serde_json"]

crates/nu-protocol/src/ast/call.rs

@@ -1,4 +1,4 @@
-use std::collections::HashMap;
+use ahash::{HashMap, HashMapExt};
 
 use serde::{Deserialize, Serialize};
 

crates/nu-protocol/src/ast/import_pattern.rs

@@ -1,7 +1,7 @@
 use serde::{Deserialize, Serialize};
 
 use crate::{span, ModuleId, Span};
-use std::collections::HashSet;
+use ahash::{HashSet, HashSetExt};
 
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub enum ImportPatternMember {

crates/nu-protocol/src/config.rs

@@ -1,6 +1,6 @@
 use crate::{ShellError, Span, Value};
+use ahash::{HashMap, HashMapExt};
 use serde::{Deserialize, Serialize};
-use std::collections::HashMap;
 
 const TRIM_STRATEGY_DEFAULT: TrimStrategy = TrimStrategy::Wrap {
     try_to_keep_words: true,

crates/nu-protocol/src/engine/capture_block.rs

@@ -1,4 +1,4 @@
-use std::collections::HashMap;
+use ahash::HashMap;
 
 use crate::{BlockId, Value, VarId};
 

crates/nu-protocol/src/engine/engine_state.rs

@@ -7,17 +7,15 @@ use crate::{
     Signature, Span, Type, VarId, Variable, VirtualPathId,
 };
 use crate::{ParseError, Value};
+use ahash::{HashMap, HashMapExt, HashSet, HashSetExt};
 use core::panic;
 use std::borrow::Borrow;
 use std::num::NonZeroUsize;
 use std::path::Path;
 use std::path::PathBuf;
-use std::{
+use std::sync::{
-    collections::{HashMap, HashSet},
+    atomic::{AtomicBool, AtomicU32},
-    sync::{
+    Arc, Mutex,
-        atomic::{AtomicBool, AtomicU32},
-        Arc, Mutex,
-    },
 };
 
 static PWD_ENV: &str = "PWD";
@@ -170,7 +168,9 @@ impl EngineState {
                 false,
             ),
             ctrlc: None,
-            env_vars: EnvVars::from([(DEFAULT_OVERLAY_NAME.to_string(), HashMap::new())]),
+            env_vars: [(DEFAULT_OVERLAY_NAME.to_string(), HashMap::new())]
+                .into_iter()
+                .collect(),
             previous_env_vars: HashMap::new(),
             config: Config::default(),
             pipeline_externals_state: Arc::new((AtomicU32::new(0), AtomicU32::new(0))),
@@ -436,7 +436,7 @@ impl EngineState {
             env_vars.insert(name, val);
         } else {
             self.env_vars
-                .insert(overlay_name, HashMap::from([(name, val)]));
+                .insert(overlay_name, [(name, val)].into_iter().collect());
         }
     }
 

crates/nu-protocol/src/engine/overlay.rs

@@ -1,6 +1,6 @@
 use crate::{DeclId, ModuleId, OverlayId, Type, Value, VarId};
+use ahash::{HashMap, HashMapExt};
 use std::borrow::Borrow;
-use std::collections::HashMap;
 use std::hash::{Hash, Hasher};
 
 pub static DEFAULT_OVERLAY_NAME: &str = "zero";

crates/nu-protocol/src/engine/stack.rs

@@ -1,4 +1,4 @@
-use std::collections::{HashMap, HashSet};
+use ahash::{HashMap, HashMapExt, HashSet, HashSetExt};
 
 use crate::engine::EngineState;
 use crate::engine::DEFAULT_OVERLAY_NAME;
@@ -154,13 +154,14 @@ impl Stack {
                 if let Some(env_vars) = scope.get_mut(last_overlay) {
                     env_vars.insert(var, value);
                 } else {
-                    scope.insert(last_overlay.into(), HashMap::from([(var, value)]));
+                    scope.insert(last_overlay.into(), [(var, value)].into_iter().collect());
                 }
             } else {
-                self.env_vars.push(HashMap::from([(
+                self.env_vars.push(
-                    last_overlay.into(),
+                    [(last_overlay.into(), [(var, value)].into_iter().collect())]
-                    HashMap::from([(var, value)]),
+                        .into_iter()
-                )]));
+                        .collect(),
+                );
             }
         } else {
             // TODO: Remove panic
@@ -394,7 +395,7 @@ impl Stack {
                         env_hidden.insert(name.into());
                     } else {
                         self.env_hidden
-                            .insert(active_overlay.into(), HashSet::from([name.into()]));
+                            .insert(active_overlay.into(), [name.into()].into_iter().collect());
                     }
 
                     return true;

crates/nu-protocol/src/value/from_value.rs

@@ -1,4 +1,4 @@
-use std::collections::HashMap;
+use ahash::{HashMap, HashMapExt};
 use std::path::PathBuf;
 use std::str::FromStr;
 

crates/nu-protocol/src/value/mod.rs

@@ -11,6 +11,7 @@ use crate::ast::{Math, Operator};
 use crate::engine::EngineState;
 use crate::ShellError;
 use crate::{did_you_mean, BlockId, Config, Span, Spanned, Type, VarId};
+use ahash::HashMap;
 use byte_unit::ByteUnit;
 use chrono::{DateTime, Duration, FixedOffset};
 use chrono_humanize::HumanTime;
@@ -25,7 +26,6 @@ pub use range::*;
 use serde::{Deserialize, Serialize};
 use std::{
     borrow::Cow,
-    collections::HashMap,
     fmt::{Display, Formatter, Result as FmtResult},
     iter,
     path::PathBuf,

crates/nu-system/Cargo.toml

@@ -31,4 +31,5 @@ mach2 = "0.4"
 chrono = "0.4"
 ntapi = "0.4"
 once_cell = "1.17"
+ahash="0.8.3"
 winapi = { version = "0.3", features = ["tlhelp32", "fileapi", "handleapi", "ifdef", "ioapiset", "minwindef", "pdh", "psapi", "synchapi", "sysinfoapi", "winbase", "winerror", "winioctl", "winnt", "oleauto", "wbemcli", "rpcdce", "combaseapi", "objidl", "powerbase", "netioapi", "lmcons", "lmaccess", "lmapibuf", "memoryapi", "shellapi", "std", "securitybaseapi"] }

crates/nu-system/src/windows.rs

@@ -1,6 +1,7 @@
 // Attribution: a lot of this came from procs https://github.com/dalance/procs
 // and sysinfo https://github.com/GuillaumeGomez/sysinfo
 
+use ahash::{HashMap, HashMapExt};
 use chrono::offset::TimeZone;
 use chrono::{Local, NaiveDate};
 use libc::c_void;
@@ -13,7 +14,6 @@ use ntapi::ntrtl::{RtlGetVersion, PRTL_USER_PROCESS_PARAMETERS, RTL_USER_PROCESS
 use ntapi::ntwow64::{PEB32, PRTL_USER_PROCESS_PARAMETERS32, RTL_USER_PROCESS_PARAMETERS32};
 use once_cell::sync::Lazy;
 use std::cell::RefCell;
-use std::collections::HashMap;
 use std::ffi::OsString;
 use std::mem::{size_of, zeroed, MaybeUninit};
 use std::os::windows::ffi::OsStringExt;

crates/nu-table/Cargo.toml

@@ -18,6 +18,7 @@ nu-color-config = { path = "../nu-color-config", version = "0.81.1" }
 nu-ansi-term = "0.47.0"
 
 tabled = { version = "0.12", features = ["color"], default-features = false }
+ahash = "0.8.3"
 
 [dev-dependencies]
 # nu-test-support = { path="../nu-test-support", version = "0.81.1"  }

crates/nu-table/src/table.rs

@@ -1,8 +1,9 @@
 use crate::table_theme::TableTheme;
+use ahash::HashMap;
 use nu_ansi_term::Style;
 use nu_color_config::TextStyle;
 use nu_protocol::TrimStrategy;
-use std::{cmp::min, collections::HashMap};
+use std::cmp::min;
 use tabled::{
     builder::Builder,
     grid::{
@@ -375,7 +376,7 @@ fn load_theme(
     let mut theme = theme.get_theme();
 
     if !with_header {
-        theme.set_horizontals(HashMap::new());
+        theme.set_horizontals(std::collections::HashMap::new());
     } else if with_footer && table.count_rows() > 2 {
         if let Some(line) = theme.get_horizontal(1) {
             theme.insert_horizontal(table.count_rows() - 1, line);

crates/nu-table/src/types/expanded.rs

@@ -1,7 +1,7 @@
+use ahash::{HashMap, HashMapExt};
 use nu_color_config::{Alignment, StyleComputer, TextStyle};
 use nu_engine::column::get_columns;
 use nu_protocol::{ast::PathMember, Config, Span, TableIndexMode, Value};
-use std::collections::HashMap;
 use std::sync::Arc;
 use std::{cmp::max, sync::atomic::AtomicBool};
 

crates/nu-table/src/types/mod.rs

@@ -2,10 +2,10 @@ mod collapse;
 mod expanded;
 mod general;
 
+use ahash::HashMap;
 use nu_color_config::{Alignment, StyleComputer, TextStyle};
 use nu_protocol::TrimStrategy;
 use nu_protocol::{Config, FooterMode, ShellError, Span, Value};
-use std::collections::HashMap;
 
 use crate::{string_wrap, NuTable, TableConfig, TableTheme};
 

crates/nu-table/src/unstructured_table.rs

@@ -1,5 +1,3 @@
-use std::collections::HashMap;
-
 use nu_color_config::StyleComputer;
 use nu_protocol::{Config, Span, Value};
 use tabled::{
@@ -46,7 +44,7 @@ fn build_table(val: TableValue, style_computer: &StyleComputer, theme: &TableThe
     let mut table = PoolTable::from(val);
 
     let mut theme = theme.get_theme_full();
-    theme.set_horizontals(HashMap::default());
+    theme.set_horizontals(std::collections::HashMap::default());
 
     table.with(SetRawStyle(theme));
     table.with(SetAlignment(AlignmentHorizontal::Left));

crates/nu_plugin_query/Cargo.toml

@@ -25,3 +25,4 @@ gjson = "0.8"
 scraper = { default-features = false, version = "0.16" }
 sxd-document = "0.3"
 sxd-xpath = "0.4"
+ahash = "0.8.3"

crates/nu_plugin_query/src/web_tables.rs

@@ -1,6 +1,6 @@
 use crate::query_web::css;
+use ahash::{HashMap, HashMapExt};
 use scraper::{element_ref::ElementRef, Html, Selector as ScraperSelector};
-use std::collections::HashMap;
 
 pub type Headers = HashMap<String, usize>;