gleam-lang/gleam

Create benchmarks for use of lists and custom types on JS

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#4,253 opened on Feb 17, 2025

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help wanted

Description

If we have a benchmark of all the operations one would do with lists and custom types we can use this to evaluate codegen changes to improve performance.

We want to be able to run this on all 3 major JS engines.

Contributor guide

Tech stack
javascript
Domain
performancetesting
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.
1-2 days
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.
clear
Prerequisites
Basic Gleam knowledgeJavaScript benchmarking experience
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
55
Research direction
Check the 'test' or 'benchmark' directories in the gleam repository for existing benchmarking infrastructure. Examine the JavaScript compilation output (likely in 'src/codegen/js') to understand how lists and custom types are represented. Look at any existing benchmarks for other features to follow the pattern. The issue mentions all 3 major JS engines (V8, SpiderMonkey, JavaScriptCore); ensure the benchmarks can be run on each. Consider using a library like 'benchmark.js' or the native perf hooks.