# Reduce duplicate bootstrap batch probes

`709a9b8`→[main](/content/gh/entireio/git-sync/commits/main/index.html)·

Soph·3mo ago·2 files·+7 added/-1 removed

## Sessions

28372368f4e8View transcript

[?\
Can you take a look at the go code (wasm) in /Users/soph/Work/entire/devenv/entire-io-worktree1 based a bit on that I wonder if something like this can be build:Codex·GPT-5.4·1 step](/content/gh/entireio/git-sync/session/019d6d29-8cf7-7fe3-adc9-8c3e4d9d5603#timeline-28372368f4e8/index.html)

## Changes

2

- docs

- Mrewrite-issue-list.md+1/-1

- internal/strategy/bootstrap

- Mbootstrap.go+6

```
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- Rewrite branch should significantly reduce HTTP round-trips during batch planning.

Current rewrite note:
- The rewrite adds an initial commit-count heuristic to reduce probing, but still performs fetch-and-discard sizing probes in the bootstrap planner.
- The rewrite adds an initial commit-count heuristic and now memoizes repeated equivalent probe results within a planning run, but it still performs fetch-and-discard sizing probes in the bootstrap planner.

### 15. Materialized fallback path does not scale to large repos
```

Mdocs/rewrite-issue-list.md+1/-1

```
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prevIdx := -1
	prevHash := plumbing.ZeroHash
	prevSpan := initialSpan
	probeCache := make(map[string]bool)
	for prevIdx < len(chain)-1 {
		bestIdx, err := planner.SampledCheckpointUnderLimit(chain, prevIdx, prevSpan, func(idx int) (bool, error) {
			cacheKey := prevHash.String() + ":" + strconv.Itoa(idx)
			if tooLarge, ok := probeCache[cacheKey]; ok {
				return tooLarge, nil
			}
			ooLarge, err := packExceedsLimit(ctx, p, ref, chain[idx], prevHash, p.BatchMaxPack)
			if err != nil {
				return false, fmt.Errorf("measure bootstrap batch for %s at %s: %w", ref.TargetRef, planner.ShortHash(chain[idx]), err)
			}
			probeCache[cacheKey] = tooLarge
			return tooLarge, nil
		})
		if err != nil {
```