add scripts to benchmark and plot performance across tags (#1293)

* add scripts to benchmark and plot performance across tags

* missing newline

* fmt

hack/bench/plot.gp

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+set terminal png size 800,600
+set output "hack/bench/versions.png"
+
+set title "User Time vs. Version"
+set xlabel "Version"
+set ylabel "Average User Time (s)"
+
+set xtics rotate by -45
+
+plot "hack/bench/plot.txt" using 2:xtic(1) with linespoints linestyle 1 notitle

hack/bench/plot.sh

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+#!/bin/bash
+
+if [ $# -ne 2 ]; then
+  echo "Usage: $0 <repository to clone> <number_of_versions_back_to_test>"
+  exit 1
+fi
+
+# Get the number of versions back to test from command line argument
+num_versions="$2"
+
+test_repo="$1"
+
+bash hack/bench/versions.sh $test_repo $num_versions | tee hack/bench/plot.txt
+
+gnuplot hack/bench/plot.gp

hack/bench/plot.txt

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+v3.33.0: 1.402
+v3.32.2: 1.298
+v3.32.1: 1.332
+v3.32.0: 1.348
+v3.31.6: 2.470
+v3.31.5: 2.462
+v3.31.4: 2.460
+v3.31.3: 2.418
+v3.31.2: 1.384
+v3.31.1: 1.344
+v3.31.0: 1.354
+v3.30.0: 1.392
+v3.29.1: 1.382
+v3.29.0: 1.340
+v3.28.7: 1.380
+v3.28.6: 1.308
+v3.28.5: 2.596
+v3.28.4: 2.554
+v3.28.3: 2.582
+v3.28.1: 2.578
+v3.28.2: 2.566
+v3.28.0: 2.552
+v3.27.1: 2.574
+v3.26.0: 2.538

hack/bench/versions.sh

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+#!/bin/bash
+
+if [ $# -ne 2 ]; then
+  echo "Usage: $0 <repository to clone> <number_of_versions_back_to_test>"
+  exit 1
+fi
+
+# Get the number of versions back to test from command line argument
+num_versions="$2"
+
+test_repo="$1"
+
+num_iterations=5
+
+# Create a temporary folder to clone the repository
+repo_tmp=$(mktemp -d)
+# Set up a trap to remove the temporary folder on exit or failure
+trap "rm -rf $repo_tmp" EXIT
+# Clone the test repository to a temporary folder
+git clone --quiet "$test_repo" $repo_tmp
+
+
+# Get list of git tags, sorted from newest to oldest
+tags=$(git tag --sort=-creatordate)
+
+# Counter to keep track of number of tags checked out
+count=0
+
+
+# Loop over tags and checkout each one in turn, up to the specified number of versions
+for tag in $tags
+do
+  if [[ $count -eq $num_versions ]]; then
+      break
+  fi
+
+  # Skip RC tags
+  if [[ $tag == *"rc"* ]]; then
+    continue
+  fi
+
+  # Skip alpha tags
+  if [[ $tag == *"alpha"* ]]; then
+    continue
+  fi
+
+  # Use git checkout with the quiet flag to suppress output
+  git checkout $tag --quiet
+
+  # Run make install with suppressed output
+  make install > /dev/null
+
+  # Initialize the variable to store the sum of user times
+  user_time_sum=0
+
+  # Run each iteration 5 times and calculate the average user time
+  for i in {1..$num_iterations}
+  do
+    # Run trufflehog with suppressed output and capture user time with /usr/bin/time
+    tmpfile=$(mktemp)
+    /usr/bin/time -o $tmpfile trufflehog git "file://$repo_tmp" --no-verification --no-update >/dev/null 2>&1
+    time_output=$(cat $tmpfile)
+    rm $tmpfile
+
+    # Extract the user time from the output
+    user_time=$(echo $time_output | awk '{print $3}')
+
+    # Add the user time to the sum
+    user_time_sum=$(echo "$user_time_sum + $user_time" | bc)
+  done
+
+  # Calculate the average user time
+  average_user_time=$(echo "scale=3; $user_time_sum / $num_iterations" | bc)
+
+  # Print the average user time output for this iteration in the specified format
+  echo "$tag: $average_user_time"
+
+  # Increment the counter
+  count=$((count+1))
+done