https://github.com/marvinhagemeister/perfdoc

CLI tool to get human readable about v8 de-optimizations
https://github.com/marvinhagemeister/perfdoc

javascript node nodejs performance v8

Last synced: 25 days ago
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CLI tool to get human readable about v8 de-optimizations

• Host: GitHub
• URL: https://github.com/marvinhagemeister/perfdoc
• Owner: marvinhagemeister
• License: mit
• Created: 2018-04-30T21:20:18.000Z (about 7 years ago)
• Default Branch: master
• Last Pushed: 2018-04-30T22:14:37.000Z (about 7 years ago)
• Last Synced: 2025-04-08T16:50:06.696Z (about 1 month ago)
• Topics: javascript, node, nodejs, performance, v8
• Language: JavaScript
• Size: 66.4 KB
• Stars: 5
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE.md

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README

        
# perfdoc

Print V8 deoptimization reasons in a developer friendly way.

Example output:

![Default CLI output](./fancy.png)

Example output with `--short` flag:

![Short CLI output](./short.png)

## Usage

```bash

npm i -g perfdoc

```

and then run the script you want to analyze

```bash

perfdoc foo.js

```

## CLI

```txt

🔍  Print V8 deoptimization reasons in a developer friendly way

Usage:

  $ perfdoc [options] 

Options:

  --short         Hide code frame

  --bail          Exit with code 1 if a deoptimization has been found

  --help, -h      Show usage information and the options listed here

  --version, -v   Show version information

Examples:

  $ perfdoc foo.js

  $ perfdoc --short foo.js

  $ node --trace-deopt foo.js | perfdoc

```

## License

`MIT`, see [license file](./LICENSE.md).