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François 068e9eaae8 simple tool to compare traces between executions (#4628) 
# Objective

- Have an easy way to compare spans between executions

## Solution

- Add a tool to compare spans from chrome traces

```bash
> cargo run --release  -p spancmp -- --help
   Compiling spancmp v0.1.0
    Finished release [optimized] target(s) in 1.10s
     Running `target/release/spancmp --help`
spancmp

USAGE:
    spancmp [OPTIONS] <TRACE> [SECOND_TRACE]

ARGS:
    <TRACE>
    <SECOND_TRACE>

OPTIONS:
    -h, --help                     Print help information
    -p, --pattern <PATTERN>        Filter spans by name matching the pattern
    -t, --threshold <THRESHOLD>    Filter spans that have an average shorther than the threshold
                                   [default: 0]
```

for each span, it will display the count, minimum duration, average duration and max duration. It can be filtered by a pattern on the span name or by a minimum average duration.

just displaying a trace
![Screenshot 2022-04-28 at 21 56 21](https://user-images.githubusercontent.com/8672791/165835310-f465c6f2-9e6b-4808-803e-884b06e49292.png)

comparing two traces
![Screenshot 2022-04-28 at 21 56 55](https://user-images.githubusercontent.com/8672791/165835353-097d266b-a70c-41b8-a8c1-27804011dc97.png)



Co-authored-by: Robert Swain <robert.swain@gmail.com>
2022-05-06 19:29:44 +00:00
..
main.rs simple tool to compare traces between executions (#4628) 2022-05-06 19:29:44 +00:00