emscripten-core/emscripten

DOC Optimizing WASM browser compilation time

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#15,249 opened on Oct 6, 2021

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Description

The documentation on optimizing compilation and optimizing load time are quite nice.

I wonder if anyone could share optimization advice specifically for the WASM compilation time in the browser. Are there options that are known to affect it, well besides the size of the produced .wasm objects? We found out that it's the bottleneck in Pyodide for large scientific Python packages (https://github.com/pyodide/pyodide/issues/347#issuecomment-933834657)

Also the documentation on the manual persistance of compiled modules to IndexedDB might need to be updated, https://github.com/emscripten-core/emscripten/blame/2595d3f703b6d6eaf312a2b027ef66c6ab3c1031/site/source/docs/compiling/Deploying-Pages.rst#L44 since that was deprecated https://github.com/WebAssembly/spec/issues/821

Contributor guide

Tech stack
ccppwasmjavascript
Domain
documentationperformance
Issue type
documentation
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
basic understanding of WebAssemblyfamiliarity with Emscripten documentation
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65
Research direction
This issue requests documentation on optimizing WASM compilation time in the browser. The submitter points to existing documentation on optimizing compilation and load time, and mentions a specific issue in Pyodide. A contributor should first review the linked documentation files: site/source/docs/optimizing/Optimizing Code.html and site/source/docs/compiling/Deploying Pages.rst. Additionally, the issue mentions a deprecation of manual persistence to IndexedDB, so investigate the status of that in the WebAssembly spec. Gather information from the Pyodide issue and the Emscripten community to compile a new section or update existing pages.
DOC Optimizing WASM browser compilation time · emscripten-core/emscripten#15249 | Good First Issue