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https://github.com/knqyf263/cob
Continuous Benchmark for Go Project
https://github.com/knqyf263/cob
benchmark ci go golang test testing
Last synced: 5 days ago
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Continuous Benchmark for Go Project
- Host: GitHub
- URL: https://github.com/knqyf263/cob
- Owner: knqyf263
- License: mit
- Created: 2020-01-11T19:43:56.000Z (almost 5 years ago)
- Default Branch: master
- Last Pushed: 2024-10-14T06:22:48.000Z (23 days ago)
- Last Synced: 2024-10-14T20:36:15.650Z (23 days ago)
- Topics: benchmark, ci, go, golang, test, testing
- Language: Go
- Homepage:
- Size: 274 KB
- Stars: 384
- Watchers: 9
- Forks: 26
- Open Issues: 8
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- awesome-list - cob
README
[](https://github.com/knqyf263/cob/releases/latest)
[](https://goreportcard.com/report/github.com/knqyf263/cob)
[](https://github.com/knqyf263/cob/blob/master/LICENSE)
# Abstract
`cob` compares benchmarks between the latest commit (HEAD) and the previous commit (HEAD{@1}). The program will fail if the change in score is worse than the threshold. This tools is suitable for CI/CD to detect a regression of a performance automatically.
`cob` runs `go test -bench` before and after commit internally, so it depends on `go` command.
**CAUTION: Note that `git reset` is executed when you run `cob`. You should commit all changes before running `cob`.**
# Table of Contents
- [Abstract](#abstract)
- [Continuous Integration (CI)](#continuous-integration-ci)
- [GitHub Actions](#github-actions)
- [Travis CI](#travis-ci)
- [CircleCI](#circleci)
- [Example](#example)
- [Run only those benchmarks matching a regular expression](#run-only-those-benchmarks-matching-a-regular-expression)
- [Show only benchmarks with worse score](#show-only-benchmarks-with-worse-score)
- [Specify a threshold](#specify-a-threshold)
- [Specify a base commit compared with HEAD](#specify-a-base-commit-compared-with-head)
- [Compare only memory allocation](#compare-only-memory-allocation)
- [Usage](#usage)
- [Q&A](#qa)
- [A result of benchmarks is unstable](#a-result-of-benchmarks-is-unstable)
# Continuous Integration (CI)
See [cob-example](https://github.com/knqyf263/cob-example) for details.
## GitHub Actions
```
name: Bench
on: [push, pull_request]
jobs:
test:
name: Bench
runs-on: ubuntu-latest
steps:
- name: Set up Go 1.13
uses: actions/setup-go@v1
with:
go-version: 1.13
id: go
- name: Check out code into the Go module directory
uses: actions/checkout@v1
- name: Install cob
run: curl -sfL https://raw.githubusercontent.com/knqyf263/cob/master/install.sh | sudo sh -s -- -b /usr/local/bin
- name: Run Benchmark
run: cob
```
## Travis CI
```
dist: bionic
language: go
go:
- 1.13.x
before_script:
- curl -sfL https://raw.githubusercontent.com/knqyf263/cob/master/install.sh | sudo sh -s -- -b /usr/local/bin
script:
- cob
```
## CircleCI
```
version: 2
jobs:
bench:
docker:
- image: circleci/golang:1.13
steps:
- checkout
- run:
name: Install cob
command: curl -sfL https://raw.githubusercontent.com/knqyf263/cob/master/install.sh | sudo sh -s -- -b /usr/local/bin
- run:
name: Run cob
command: cob
workflows:
version: 2
build-workflow:
jobs:
- bench
```
# Example
## Override a command to measure benchmarks
To measure benchmarks by `make bench`, you can use `-bench-cmd` and `-bench-args` options.
```
$ cob -bench-cmd make -bench-args bench
```
## Run only those benchmarks matching a regular expression
```
$ cob -bench-args "test -bench Append -benchmem ./..."
```
Result
```
2020/01/12 17:32:30 Run Benchmark: 4363944cbed3da7a8245cbcdc8d8240b8976eb24 HEAD{@1}
2020/01/12 17:32:32 Run Benchmark: 599a5523729d4d99a331b9d3f71dde9e1e6daef0 HEAD
Result
======
+-----------------------------+----------+---------------+-------------------+
| Name | Commit | NsPerOp | AllocedBytesPerOp |
+-----------------------------+----------+---------------+-------------------+
| BenchmarkAppend_Allocate-16 | HEAD | 179.00 ns/op | 117 B/op |
+ +----------+---------------+-------------------+
| | HEAD@{1} | 115.00 ns/op | 23 B/op |
+-----------------------------+----------+---------------+-------------------+
Comparison
==========
+-----------------------------+---------+-------------------+
| Name | NsPerOp | AllocedBytesPerOp |
+-----------------------------+---------+-------------------+
| BenchmarkAppend_Allocate-16 | 55.65% | 408.70% |
+-----------------------------+---------+-------------------+
```
## Show only benchmarks with worse score
```
$ cob -only-degression
```
Result
```
2020/01/12 17:48:35 Run Benchmark: 4363944cbed3da7a8245cbcdc8d8240b8976eb24 HEAD{@1}
2020/01/12 17:48:38 Run Benchmark: 599a5523729d4d99a331b9d3f71dde9e1e6daef0 HEAD
Comparison
==========
+-----------------------------+---------+-------------------+
| Name | NsPerOp | AllocedBytesPerOp |
+-----------------------------+---------+-------------------+
| BenchmarkAppend_Allocate-16 | 52.34% | 347.83% |
+-----------------------------+---------+-------------------+
2020/01/12 17:48:39 This commit makes benchmarks worse
```
## Specify a threshold
The following option means the program fails if a benchmark score gets worse than 50%.
```
$ cob -threshold 0.5 ./...
```
## Specify a base commit compared with HEAD
By default, `cob` uses `HEAD~1`. If you compare benchmarks with different commit, you can use `--base` option.
```
$ cob --base origin/master ./...
```
## Compare only memory allocation
You can use `-compare` option.
```
$ cob -compare B/op
```
Result
```
2020/01/15 14:46:31 Run Benchmark: 4363944cbed3da7a8245cbcdc8d8240b8976eb24 HEAD~1
2020/01/15 14:46:33 Run Benchmark: 599a5523729d4d99a331b9d3f71dde9e1e6daef0 HEAD
Result
======
+-----------------------------+----------+---------------+-------------------+
| Name | Commit | NsPerOp | AllocedBytesPerOp |
+-----------------------------+----------+---------------+-------------------+
| BenchmarkAppend_Allocate-16 | HEAD | 179.00 ns/op | 121 B/op |
+ +----------+---------------+-------------------+
| | HEAD@{1} | 104.00 ns/op | 23 B/op |
+-----------------------------+----------+---------------+-------------------+
| BenchmarkCall-16 | HEAD | 0.50 ns/op | 0 B/op |
+ +----------+---------------+ +
| | HEAD@{1} | 0.49 ns/op | |
+-----------------------------+----------+---------------+-------------------+
Comparison
==========
+-----------------------------+---------+-------------------+
| Name | NsPerOp | AllocedBytesPerOp |
+-----------------------------+---------+-------------------+
| BenchmarkAppend_Allocate-16 | - | 426.09% |
+-----------------------------+---------+-------------------+
| BenchmarkCall-16 | - | 0.00% |
+-----------------------------+---------+-------------------+
2020/01/15 14:46:35 This commit makes benchmarks worse
```
## Skip running cob
If your commit message contains `[skip cob]`, cob is skipped.
```
$ git add README.md
$ git commit -m "[skip cob] update README.md"
$ cob
2020/04/19 12:46:57 [skip cob] is detected, so the benchmark is skipped
```
# Usage
```
NAME:
cob - Continuous Benchmark for Go project
USAGE:
cob [global options] command [command options] [arguments...]
COMMANDS:
help, h Shows a list of commands or help for one command
GLOBAL OPTIONS:
--only-degression Show only benchmarks with worse score (default: false)
--threshold value The program fails if the benchmark gets worse than the threshold (default: 0.2)
--base value Specify a base commit compared with HEAD (default: "HEAD~1")
--compare value Which score to compare (default: "ns/op,B/op")
--bench-cmd value Specify a command to measure benchmarks (default: "go")
--bench-args value Specify arguments passed to -cmd (default: "test -run '^$' -bench . -benchmem ./...")
--help, -h show help (default: false)
```
# Q&A
## Benchmarks with the same name
Specify a package name.
```
$ cob -bench-args "test -bench . -benchmem ./foo"
$ cob -bench-args "test -bench . -benchmem ./bar"
```
## A result of benchmarks is unstable
You can specify `-benchtime`.
```
$ cob -bench-args "test -bench . -benchmem -benchtime 10s ./..."
```
# License
This repository is available under the [MIT](https://github.com/knqyf263/cob/blob/master/LICENSE)
# Author
[Teppei Fukuda](https://github.com/knqyf263) (knqyf263)