rustwasm/wee_alloc

Emit statistics / visualizations of heap fragmentation.

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#11 opened on Feb 2, 2018

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Description

Summary

Emit statistics / visualizations of heap fragmentation. There are edge cases where we can't currently consolidate adjacent free cells into a larger, contiguous free cell. This would let us empirically answer whether that is a problem in practice.

Motivation

Remove "unknown unknowns". Be a better allocator.

Details

  • Maybe use graphviz.

  • At least get some statistics / aggregated numbers on free vs allocated and distribution of free cell sizes in the free list.

Contributor guide

Research direction
Explore the wee alloc source to understand the internal data structures (free list, heap layout) and determine how to add instrumentation to track fragmentation statistics. Consider using Graphviz for visualization or outputting aggregated numbers.
Tech stack
rust
Domain
backend
Issue type
Feature
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.
Half day
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.
Mostly clear
Prerequisites
Rust
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40