ben zhang e05028e7b0 Prefetch sibling rollout paths when reading history pages (#55396) ...

## Why

Resolving a history page's rollout lineage performs a separate filesystem lookup for each ancestor. Ancestors stored alongside the current rollout can share a lookup traversal.

## What changed

- Prefetch paths for up to 64 sibling rollout IDs belonging to the same thread when listing history turns or items.
- Resolve candidates in the normal lookup order to preserve first-match selection for duplicate rollout IDs.
- Validate prefetched paths before use and fall back to normal lookup for missing or stale paths. Treat prefetch failures as optional and continue with normal resolution.

## Testing

Add a regression test verifying that sibling prefetch selects the same first match for a duplicate rollout ID as normal lookup.

GitOrigin-RevId: 5d86c9643562a82a53af78b20f70322c1506c6e1

2026-10-19 22:04:38 +00:00

..

compression

Preserve rollout access metadata across compression and restoration (#55252)

2026-10-19 11:02:40 +00:00

compression_tests.rs

Preserve rollout access metadata across compression and restoration (#55252)

2026-10-19 11:02:40 +00:00

compression.rs

Preserve rollout access metadata across compression and restoration (#55252)

2026-10-19 11:02:40 +00:00

config.rs

Honor the configured SQLite home across state consumers (#34994)

2026-07-23 19:19:35 +00:00

lib.rs

Prefetch sibling rollout paths when reading history pages (#55396)

2026-10-19 22:04:38 +00:00

list_files_tests.rs

Batch rollout listing scans on cancellable blocking workers (#49694)

2026-09-30 18:03:48 +00:00

list_files.rs

Prefetch sibling rollout paths when reading history pages (#55396)

2026-10-19 22:04:38 +00:00

list.rs

Prefetch sibling rollout paths when reading history pages (#55396)

2026-10-19 22:04:38 +00:00

maintenance.rs

Add legacy rollout migration to paginated history (#37175)

2026-08-05 22:57:27 +00:00

metadata_tests.rs

Persist resume metadata in compaction checkpoints (#47323)

2026-09-22 16:35:30 +00:00

metadata.rs

Persist thread creator identity in rollouts and SQLite (#47113)

2026-09-21 21:22:01 +00:00

model_context.rs

Resume model context from the latest compaction boundary (#47365)

2026-09-22 21:17:08 +00:00

ordinal.rs

Route rollout reads through the canonical JSON decoder (#42378)

2026-09-02 22:45:19 +00:00

persistence_metrics_tests.rs

Add opt-in output token replay for OpenAI requests (#52742)

2026-10-10 01:25:00 +00:00

persistence_metrics.rs

Measure rollout persistence size reductions (#50454)

2026-10-02 23:06:56 +00:00

policy_tests.rs

Record local image inputs on completed image-generation items (#54420)

2026-10-15 21:30:56 +00:00

policy.rs

Store generated image items as attachment references (#54398)

2026-10-15 19:51:22 +00:00

recorder_tests.rs

Preserve thread metadata before rollout files are materialized (#55380)

2026-10-19 21:02:19 +00:00

recorder.rs

Preserve thread metadata before rollout files are materialized (#55380)

2026-10-19 21:02:19 +00:00

reverse_jsonl_scanner_tests.rs

Preserve legacy semantics during rollout migration (#37191)

2026-08-06 00:54:14 +00:00

reverse_jsonl_scanner.rs

Use memrchr to find newlines in reverse JSONL scans (#49444)

2026-09-30 02:19:47 +00:00

rollout_file_name_tests.rs

Distinguish rollout IDs from thread IDs (#38127)

2026-08-12 05:20:32 +00:00

rollout_file_name.rs

Distinguish rollout IDs from thread IDs (#38127)

2026-08-12 05:20:32 +00:00

rollout_reference_index_tests.rs

Limit unarchive scans to the requested thread's archived rollouts (#54060)

2026-10-14 18:19:02 +00:00

rollout_reference_index.rs

Limit unarchive scans to the requested thread's archived rollouts (#54060)

2026-10-14 18:19:02 +00:00

search_tests.rs

Reuse compiled search patterns across compressed rollouts (#53732)

2026-10-13 17:54:31 +00:00

search.rs

Reuse compiled search patterns across compressed rollouts (#53732)

2026-10-13 17:54:31 +00:00

seekable_reader_tests.rs

Stop rollout reads when the calling task is cancelled (#53947)

2026-10-14 10:46:14 +00:00

seekable_reader.rs

Stop rollout reads when the calling task is cancelled (#53947)

2026-10-14 10:46:14 +00:00

session_index_tests.rs

Test session index thread-name append and removal (#49959)

2026-10-01 11:09:12 +00:00

session_index.rs

Move session index I/O off async runtime threads (#49708)

2026-09-30 18:51:29 +00:00

sqlite_metrics.rs

Add telemetry for SQLite log persistence (#40726)

2026-08-25 22:46:49 +00:00

state_db_tests.rs

Persist thread creator identity in rollouts and SQLite (#47113)

2026-09-21 21:22:01 +00:00

state_db.rs

Add experimental app-server project APIs (#38940)

2026-08-17 04:01:37 +00:00

tests.rs

Prefetch sibling rollout paths when reading history pages (#55396)

2026-10-19 22:04:38 +00:00

writer_lock_tests.rs

Coordinate rollout compression with active thread writers (#44138)

2026-09-09 12:30:07 +00:00

writer_lock.rs

Coordinate rollout compression with active thread writers (#44138)

2026-09-09 12:30:07 +00:00