- cap 1024 (WO_MAILBOX override at boot): sender-side atomic
reserve/release on every path — same-shard, cross-shard envelope,
OOM rollbacks; full mailbox traps the SENDER catchably; delivery
pop releases; overshoot bounded by in-flight sends (disclosed)
- test_mailbox 12/0: exact cap single-threaded, two racing senders win
exactly cap slots, drain/refill clean
- corpus run/mailbox-full-trap: parked sleeper, send loop catches
"actor mailbox full" after >= 1024 sends
- pre-existing compiler bug found + fixed: a try ARM yielding a Text
PLACE (bare e.msg, try box.field) aliased a register the arm's scope
end freed — ASan use-after-free, SEGV on the next unwind's
double-walk; emit_try now applies copy_place_text to both arm
results; pinned by corpus run/catch-msg-place
- db-bench driver: msgrate keeps iteration 22's unbounded-flood
contract via WO_MAILBOX=MSG_N (the cap is 24's policy, not 22's)
- battery 12/12 fresh-built
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
- engine: wo_idx_probe answers single-column equality from the index
hash buckets (idx_hash_key1 reproduces idx_hash bit for bit; verify
compares exactly as the slab walk did, so results identical);
composite indexes keep the walk; both executors wired (local + DB
actor RPC)
- compiler: probe_key_of_where lowers "var.col == key" on an indexed
column to DB_PROBE; all where guards still run (guard stays the
final arbiter); keys = ident/int-literal only; Float/Bytes excluded
(engine raw-eq narrower than VM float-eq)
- measured: reads 1.3k -> 1.3M ops/s, p50 600us -> 1us (~x850);
query x830; mixread 1.3k -> 89k s1, 21 -> ~1.9k sN
- gate policy moved into the driver (tolerance_for: refresh-proof);
latency floors max(4x,100us); quick mode skips poll-bound mix
floors; both tolerance classes proven to bite
- proof: test_table wo_idx_probe suite (RED first), corpus
query-index-probe 105/0, full battery green, TSan clean, two
campaigns pass the refreshed baseline
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
- bench/baseline.json: 74 metrics from the first full campaign;
tolerances tuned by a two-run repeatability check (mix* 50%,
read/query 35%, rest 15% — rationale in _config)
- gate bites: --check mode; doctored copy fails, both real runs 74/0
- headline: durable seed 4.5k/s vs ram 297k/s (23's case); reads
O(table) at ~1.5k/s; mixread 1280 vs 21 ops/s single-vs-multi
(the arc's price); msgrate 13.4M vs 2.45M (mutex-inbox number)
- arc delta recorded in story 8; findings in sample README
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
