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Summary

  • Added PrecompileTools.jl dependency and precompilation workload to reduce time-to-first-X (TTFX)
  • Created src/precompilation.jl with workloads for VectorOfArray, DiffEqArray, ArrayPartition, indexing, broadcasting, and array conversions

Performance Improvements (TTFX)

Operation Before (ms) After (ms) Improvement
VectorOfArray creation 350 48 7.4x faster
Indexing operations 289 0.8 361x faster
Broadcasting 185 0.6 308x faster
Array conversion 138 0.6 230x faster
ArrayPartition + recursive_mean 83 0.7 119x faster
Total TTFX 1399 358 3.9x faster

Precompilation time increases from ~2.8s to ~4.3s (+54%), but the 1+ second savings in TTFX makes this a worthwhile tradeoff for users.

No invalidations were detected when loading RecursiveArrayTools.

Test plan

  • All existing tests pass
  • Measured TTFX improvements
  • Verified no invalidations introduced

cc @ChrisRackauckas

🤖 Generated with Claude Code

This PR adds a precompilation workload using PrecompileTools.jl to
significantly reduce time-to-first-X (TTFX) for common operations.

## Changes

- Added PrecompileTools as a dependency
- Created `src/precompilation.jl` with workloads for:
  - VectorOfArray creation
  - DiffEqArray creation
  - Basic indexing operations
  - Broadcasting operations
  - Array conversions
  - ArrayPartition operations
  - recursive_mean, recursivecopy

## Performance Improvements (TTFX)

| Operation | Before (ms) | After (ms) | Improvement |
|-----------|------------|-----------|-------------|
| VectorOfArray creation | 350 | 48 | **7.4x faster** |
| Indexing operations | 289 | 0.8 | **361x faster** |
| Broadcasting | 185 | 0.6 | **308x faster** |
| Array conversion | 138 | 0.6 | **230x faster** |
| ArrayPartition + recursive_mean | 83 | 0.7 | **119x faster** |
| **Total TTFX** | **1399** | **358** | **3.9x faster** |

Precompilation time increases from ~2.8s to ~4.3s, but the 1+ second
savings in TTFX makes this a worthwhile tradeoff.

No invalidations were detected when loading RecursiveArrayTools.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
@ChrisRackauckas ChrisRackauckas merged commit 1d1c5c2 into SciML:master Jan 3, 2026
21 of 28 checks passed
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3 participants