mirror of
https://github.com/danog/dart-sass.git
synced 2024-11-30 04:39:03 +01:00
183 lines
6.1 KiB
Markdown
183 lines
6.1 KiB
Markdown
These benchmarks are informal and only intended to give us a general sense of
|
|
the benefit Dart Sass could provide relative to other implementations.
|
|
|
|
This was tested against:
|
|
|
|
* libsass d4d74ef5 and sassc 66f0ef3 compiled with g++ (Debian 10.2.0-16) 10.2.0.
|
|
* Dart Sass ae967c7 on Dart 2.10.4 (stable) (Wed Nov 11 13:35:58 2020 +0100) on "linux_x64" and Node v14.7.0.
|
|
|
|
on Debian x64 with Intel Core i7-8650U CPU @ 1.90GHz.
|
|
|
|
# Measurements
|
|
|
|
I ran five instances of each configuration and recorded the fastest time.
|
|
|
|
## Small Plain CSS
|
|
|
|
Running on a file containing 4 instances of `.foo {a: b}`:
|
|
|
|
* sassc: 0.002s
|
|
* Dart Sass from a script snapshot: 0.179s
|
|
* Dart Sass native executable: 0.009s
|
|
* Dart Sass on Node.js: 0.248s
|
|
|
|
Based on these numbers, Dart Sass from a native executable is approximately:
|
|
|
|
* 4.5x slower than libsass
|
|
* 27.6x faster than Dart Sass on Node
|
|
|
|
## Large Plain CSS
|
|
|
|
Running on a file containing 2^17 instances of `.foo {a: b}`:
|
|
|
|
* sassc: 1.770s
|
|
* Dart Sass from a script snapshot: 1.548s
|
|
* Dart Sass native executable: 1.379s
|
|
* Dart Sass on Node.js: 2.587s
|
|
|
|
Based on these numbers, Dart Sass from a native executable is approximately:
|
|
|
|
* 1.3x faster than libsass
|
|
* 1.9x faster than Dart Sass on Node
|
|
|
|
## Preceding Sparse `@extend`
|
|
|
|
Running on a file containing `.x {@extend .y}`, 2^17 instances of `.foo {a: b}`, and then `.y {a: b}`:
|
|
|
|
* sassc: 1.797s
|
|
* Dart Sass from a script snapshot: 1.594s
|
|
* Dart Sass native executable: 1.490s
|
|
* Dart Sass on Node.js: 2.783s
|
|
|
|
Based on these numbers, Dart Sass from a native executable is approximately:
|
|
|
|
* 1.2x faster than libsass
|
|
* 1.9x faster than Dart Sass on Node
|
|
|
|
## Following Sparse `@extend`
|
|
|
|
Running on a file containing `.y {a: b}`, 2^17 instances of `.foo {a: b}`, and then `.x {@extend .y}`:
|
|
|
|
* sassc: 1.902s
|
|
* Dart Sass from a script snapshot: 1.587s
|
|
* Dart Sass native executable: 1.425s
|
|
* Dart Sass on Node.js: 2.550s
|
|
|
|
Based on these numbers, Dart Sass from a native executable is approximately:
|
|
|
|
* 1.3x faster than libsass
|
|
* 1.8x faster than Dart Sass on Node
|
|
|
|
## Preceding Dense `@extend`
|
|
|
|
Running on a file containing `.bar {@extend .foo}` followed by 2^17 instances of `.foo {a: b}`:
|
|
|
|
* sassc: 2.556s
|
|
* Dart Sass from a script snapshot: 2.426s
|
|
* Dart Sass native executable: 2.293s
|
|
* Dart Sass on Node.js: 4.843s
|
|
|
|
Based on these numbers, Dart Sass from a native executable is approximately:
|
|
|
|
* 1.1x faster than libsass
|
|
* 2.1x faster than Dart Sass on Node
|
|
|
|
## Following Dense `@extend`
|
|
|
|
Running on a file containing 2^17 instances of `.foo {a: b}` followed by `.bar {@extend .foo}`:
|
|
|
|
* sassc: 2.567s
|
|
* Dart Sass from a script snapshot: 2.270s
|
|
* Dart Sass native executable: 2.174s
|
|
* Dart Sass on Node.js: 4.285s
|
|
|
|
Based on these numbers, Dart Sass from a native executable is approximately:
|
|
|
|
* 1.2x faster than libsass
|
|
* 2.0x faster than Dart Sass on Node
|
|
|
|
## Bootstrap
|
|
|
|
Running on a file containing 16 instances of importing the Bootstrap framework:
|
|
|
|
* sassc: 0.798s
|
|
* Dart Sass from a script snapshot: 1.417s
|
|
* Dart Sass native executable: 0.708s
|
|
* Dart Sass on Node.js: 2.832s
|
|
|
|
Based on these numbers, Dart Sass from a native executable is approximately:
|
|
|
|
* 1.1x faster than libsass
|
|
* 4.0x faster than Dart Sass on Node
|
|
|
|
## a11ycolor
|
|
|
|
Running on a file containing test cases for a computation-intensive color-processing library:
|
|
|
|
* sassc: 0.239s
|
|
* Dart Sass from a script snapshot: 0.661s
|
|
* Dart Sass native executable: 0.319s
|
|
* Dart Sass on Node.js: 0.882s
|
|
|
|
Based on these numbers, Dart Sass from a native executable is approximately:
|
|
|
|
* 1.3x slower than libsass
|
|
* 2.8x faster than Dart Sass on Node
|
|
|
|
## Susy
|
|
|
|
Running on a file containing test cases for the computation-intensive Susy grid framework:
|
|
|
|
* sassc: 0.201s
|
|
* Dart Sass from a script snapshot: 0.706s
|
|
* Dart Sass native executable: 0.141s
|
|
* Dart Sass on Node.js: 1.187s
|
|
|
|
Based on these numbers, Dart Sass from a native executable is approximately:
|
|
|
|
* 1.4x faster than libsass
|
|
* 8.4x faster than Dart Sass on Node
|
|
|
|
## Duomo
|
|
|
|
Running on a file containing the output of the numerically-intensive Duomo framework:
|
|
|
|
* Dart Sass from a script snapshot: 2.017s
|
|
* Dart Sass native executable: 1.213s
|
|
* Dart Sass on Node.js: 3.632s
|
|
|
|
Based on these numbers, Dart Sass from a native executable is approximately:
|
|
|
|
* 3.0x faster than Dart Sass on Node
|
|
|
|
# Prior Measurements
|
|
|
|
* [1.22.6](https://github.com/sass/dart-sass/blob/eec6ccc9d96fdb5dd30122a0c824efe8a6bfd168/perf.md).
|
|
* [1.22.5](https://github.com/sass/dart-sass/blob/ed73c2c053435703cfbee8709f0dfb110cd31487/perf.md).
|
|
* [1.22.4](https://github.com/sass/dart-sass/blob/a7172a2b1dd48b339e5d57159ed364ffb9f5812e/perf.md).
|
|
* [1.20.2](https://github.com/sass/dart-sass/blob/4b7699291c9f69533d25980d23b0647266b665f2/perf.md).
|
|
* [1.13.4](https://github.com/sass/dart-sass/blob/b6ccc91a138e75420227ff79381c5f70e60254f1/perf.md).
|
|
* [1.6.0](https://github.com/sass/dart-sass/blob/048cbe197a77e1cf4b837a40a5acb737e949fd5c/perf.md).
|
|
* [1.0.0-alpha.8](https://github.com/sass/dart-sass/blob/be44245a849f2bb18b5ca1fc74f3043a36da17f0/perf.md).
|
|
* [Pre-alpha, 30 September 2016](https://github.com/sass/dart-sass/blob/169370bf18fd01d0618b0fc00d9db33e2fc52aa7/perf.md).
|
|
* [Pre-alpha, 19 August 2016](https://github.com/sass/dart-sass/blob/4bea13cfe57d9e3c7f1f8580b80c59abe1cfabf8/perf.md).
|
|
* [Pre-alpha, 15 July 2016](https://github.com/sass/dart-sass/blob/a3e00059c4371bfde9afada1759d8484aee05584/perf.md).
|
|
|
|
# Conclusions
|
|
|
|
This is the first measurement with Dart Sass running as ahead-of-time-compiled
|
|
native code, and the results are encouraging. It's well below the 100ms
|
|
threshold for tiny files, and it's on par with SassC for most test cases. SassC
|
|
still leads for tests with many extends, although only slightly, and for one of
|
|
our real-world test cases (although Dart Sass leads in others). The two
|
|
implementations can be fairly described as having about the same performance
|
|
overall.
|
|
|
|
Dart Sass on Node is still substantially slower than on the Dart VM, and that
|
|
relative slowdown becomes more pronounced as the raw Dart code becomes faster.
|
|
Solutions for this such as [the embedded protocol][] or [WebAssembly support][]
|
|
are becoming more and more important.
|
|
|
|
[the embedded protocol]: https://github.com/sass/sass-embedded-protocol
|
|
[WebAssembly support]: https://github.com/dart-lang/sdk/issues/32894
|