SciML/OrdinaryDiffEq.jl

Use cache vectors in auto dt to get rid of allocations

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#220 opened on Nov 4, 2017

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Description

Can be done by a simple trait vector which is used to pull a tmp variable from a cache. Can probably default to cache.tmp since that's common, and then overload as necessary.

Contributor guide

Tech stack
None
Domain
performance
Issue type
performance
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
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.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Julia basicsunderstanding of caching
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
Investigate the source code of OrdinaryDiffEq.jl in the SciML repository to locate where auto dt allocation occurs. Look for existing cache structures (e.g., `cache.tmp`) and implement a trait based vector approach to reuse them, reducing allocations. Check issue #220 and any related discussions or linked PRs for additional context.