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nex3 merged 2 commits into from
Jan 6, 2022
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Use a more recent version of Carbon for our benchmarks #1573

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4fa365a
Use a more recent version of Carbon for our benchmarks
nex3 Dec 15, 2021
a6c3540
Update performance numbers
nex3 Jan 6, 2022
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Update performance numbers
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@nex3
nex3 committed Jan 6, 2022
commit a6c3540f4f81af653dab30f0a4a53401f3e325ae
114 changes: 57 additions & 57 deletions perf.md
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Expand Up @@ -3,8 +3,8 @@ the benefit Dart Sass could provide relative to other implementations.

This was tested against:

* libsass da91d985 and sassc 66f0ef3 compiled with g++ (Debian 10.3.0-11) 10.3.0.
* Dart Sass bf318a8 on Dart 2.14.1 (stable) (Wed Sep 8 13:33:08 2021 +0200) on "linux_x64" and Node v16.10.0.
* libsass 006bbf5 and sassc 66f0ef3 compiled with g++ (Debian 11.2.0-10) 11.2.0.
* Dart Sass 4fa365a on Dart 2.15.0 (stable) (Fri Dec 3 14:23:23 2021 +0100) on "linux_x64" and Node v16.10.0.

on Debian x64 with Intel Core i7-8650U CPU @ 1.90GHz.

Expand All @@ -16,139 +16,139 @@ I ran five instances of each configuration and recorded the fastest time.

Running on a file containing 4 instances of `.foo {a: b}`:

* sassc: 0.002s
* Dart Sass from a script snapshot: 0.177s
* Dart Sass native executable: 0.009s
* Dart Sass on Node.js: 0.219s
* sassc: 0.003s
* Dart Sass from a script snapshot: 0.327s
* Dart Sass native executable: 0.011s
* Dart Sass on Node.js: 0.281s

Based on these numbers, Dart Sass from a native executable is approximately:

* 4.5x slower than libsass
* 24.3x faster than Dart Sass on Node
* 3.7x slower than libsass
* 25.5x faster than Dart Sass on Node

## Large Plain CSS

Running on a file containing 2^17 instances of `.foo {a: b}`:

* sassc: 1.607s
* Dart Sass from a script snapshot: 1.643s
* Dart Sass native executable: 1.473s
* Dart Sass on Node.js: 2.529s
* sassc: 1.769s
* Dart Sass from a script snapshot: 2.061s
* Dart Sass native executable: 1.666s
* Dart Sass on Node.js: 3.913s

Based on these numbers, Dart Sass from a native executable is approximately:

* 1.1x faster than libsass
* 1.7x faster than Dart Sass on Node
* 2.3x 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: 1.643s
* Dart Sass from a script snapshot: 1.723s
* Dart Sass native executable: 1.535s
* Dart Sass on Node.js: 2.574s
* sassc: 1.846s
* Dart Sass from a script snapshot: 2.218s
* Dart Sass native executable: 1.726s
* Dart Sass on Node.js: 4.176s

Based on these numbers, Dart Sass from a native executable is approximately:

* 1.1x faster than libsass
* 1.7x faster than Dart Sass on Node
* 2.4x 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: 1.642s
* Dart Sass from a script snapshot: 1.676s
* Dart Sass native executable: 1.517s
* Dart Sass on Node.js: 2.547s
* sassc: 1.778s
* Dart Sass from a script snapshot: 2.058s
* Dart Sass native executable: 2.152s
* Dart Sass on Node.js: 4.231s

Based on these numbers, Dart Sass from a native executable is approximately:

* 1.1x faster than libsass
* 1.7x faster than Dart Sass on Node
* 1.2x slower than libsass
* 2.0x 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: 2.336s
* Dart Sass from a script snapshot: 2.453s
* Dart Sass native executable: 2.312s
* Dart Sass on Node.js: 5.874s
* sassc: 2.393s
* Dart Sass from a script snapshot: 2.981s
* Dart Sass native executable: 2.942s
* Dart Sass on Node.js: 9.858s

Based on these numbers, Dart Sass from a native executable is approximately:

* identical to libsass
* 2.5x faster than Dart Sass on Node
* 1.2x slower than libsass
* 3.4x 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: 2.353s
* Dart Sass from a script snapshot: 2.357s
* Dart Sass native executable: 2.220s
* Dart Sass on Node.js: 5.587s
* sassc: 2.685s
* Dart Sass from a script snapshot: 3.838s
* Dart Sass native executable: 3.033s
* Dart Sass on Node.js: 9.527s

Based on these numbers, Dart Sass from a native executable is approximately:

* 1.1x faster than libsass
* 2.5x faster than Dart Sass on Node
* 1.1x slower than libsass
* 3.1x faster than Dart Sass on Node

## Bootstrap

Running on a file containing 16 instances of importing the Bootstrap framework:

* sassc: 0.789s
* Dart Sass from a script snapshot: 1.517s
* Dart Sass native executable: 0.691s
* Dart Sass on Node.js: 2.799s
* sassc: 0.891s
* Dart Sass from a script snapshot: 2.041s
* Dart Sass native executable: 0.787s
* Dart Sass on Node.js: 4.218s

Based on these numbers, Dart Sass from a native executable is approximately:

* 1.1x faster than libsass
* 4.1x faster than Dart Sass on Node
* 5.4x faster than Dart Sass on Node

## a11ycolor

Running on a file containing test cases for a computation-intensive color-processing library:

* sassc: 0.205s
* Dart Sass from a script snapshot: 0.649s
* Dart Sass native executable: 0.245s
* Dart Sass on Node.js: 0.827s
* sassc: 0.387s
* Dart Sass from a script snapshot: 0.970s
* Dart Sass native executable: 0.367s
* Dart Sass on Node.js: 1.409s

Based on these numbers, Dart Sass from a native executable is approximately:

* 1.2x slower than libsass
* 3.4x faster than Dart Sass on Node
* 1.1x faster than libsass
* 3.8x faster than Dart Sass on Node

## Duomo

Running on a file containing the output of the numerically-intensive Duomo framework (skipping LibSass due to module system use):

* Dart Sass from a script snapshot: 2.150s
* Dart Sass native executable: 1.406s
* Dart Sass on Node.js: 4.449s
* Dart Sass from a script snapshot: 3.946s
* Dart Sass native executable: 2.169s
* Dart Sass on Node.js: 7.108s

Based on these numbers, Dart Sass from a native executable is approximately:

* 3.2x faster than Dart Sass on Node
* 3.3x faster than Dart Sass on Node

## Carbon

Running on a file containing the output of the import-intensive Carbon framework:

* sassc: 7.481s
* Dart Sass from a script snapshot: 5.891s
* Dart Sass native executable: 5.734s
* Dart Sass on Node.js: 15.725s
* sassc: 9.373s
* Dart Sass from a script snapshot: 7.454s
* Dart Sass native executable: 7.537s
* Dart Sass on Node.js: 25.790s

Based on these numbers, Dart Sass from a native executable is approximately:

* 1.3x faster than libsass
* 2.7x faster than Dart Sass on Node
* 1.2x faster than libsass
* 3.4x faster than Dart Sass on Node

# Prior Measurements

Expand Down