sass/dart-sass

Make the JS version faster

Open

#113 opened on Feb 3, 2017

View on GitHub
 (37 comments) (33 reactions) (0 assignees)Dart (4,192 stars) (376 forks)batch import
JavaScriptenhancementhelp wanted

Description

The JS-compiled version of Dart Sass hovers around 2.5x and 3x slower than when running on the Dart VM. Some slowdown is inevitable, but this seems extreme. We should put dedicated effort into profiling the JS output and optimizing hot spots.

Contributor guide

Tech stack
javascript
Domain
performance
Issue type
performance
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
over 1 week
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
needs investigation
Prerequisites
JavaScript profilingDart language basicsSass compiler internals
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20
Research direction
The issue requires identifying performance bottlenecks in the JavaScript compiled output of Dart Sass. Review the existing 37 comments for any profiling data or suggested hot spots. Investigate the Dart source code's compilation output, possibly examining the 'lib' directory and JavaScript generation logic. Look for any linked PRs or branches mentioned in the comments that attempted optimizations.