jsbench 0.2.1 jsbench: ^0.2.1 copied to clipboard
Dart->JS Size and Performance Tool
jsbench
#
A minimal Dart -> JavaScript size and performance tool.
This library assumes you are either using pub build
or a similar tool to
generate .dart.js
files from .dart
files, but otherwise makes no other
assumptions. It is recommended to use --dump-info
to output additional
information about the compilation.
Example #
The following is an example of running jsbench
on this repository:
$ pub build
$ pub run jsbench
main.dart.js | 35.9 kB | |
---|---|---|
compiler overhead | 16.6 kB | 46.1% |
minified? | Yes |
noSuchMethod? | No | |
---|---|---|
dart:_js_helper | 10.9 kB | 30.3% |
dart:html | 3.39 kB | 09.4% |
dart:core | 2.47 kB | 06.9% |
dart:_interceptors | 2.06 kB | 05.7% |
Usage #
This tool should either be used via pub global activate
or as
part of your dev_dependencies
.
Then, build your application, and run jsbench
. For example:
$ pub build
$ pub run jsbench
To get more interesting information (not just disk size), add --dump-info
:
transformers:
- $dart2js:
commandLineOptions:
- --dump-info
See this packages' pubspec.yaml
for an example.
If you want more information check out dump-info-visualizer
.
Flags #
--no-dump
: Ignores all .info.json
files on disk.
--no-collapse-package
: Do not collapse all package:<name>
libraries.
--dump-trivial-size
: Threshold number of bytes to print out a library name.
--input
: Glob pattern(s) to find emitted JavaScript files.
--exclude
Glob pattern(s) to exclude when finding inputs.
--archive
: Archive formats to recursively read from when finding inputs. Only
tar
is currently supported.