Buffer Wasm metadata reads

2026-07-19 06:43:19 +00:00
parent a9e24cffc4
commit 15fdfe725d
6 changed files with 182 additions and 40 deletions
@@ -243,8 +243,12 @@ check. Exact repeated load paths are then deduplicated before canonicalization,
 while distinct aliases are resolved independently so symlink retargets remain
 visible by the next hard validation.
 When a current serialized module exists, the worker scans wasm section headers
-and reads only `dylink.0`, `uce.abi`, and the tiny `uce.module` identity; it does
-not fault the code and data bodies into every new worker. A missing/stale/invalid serialized module
+through a bounded 4 KiB positional buffer and retains only `dylink.0`, `uce.abi`,
+and the tiny `uce.module` identity. It skips code and data bodies rather than
+issuing byte-at-a-time reads or faulting those bodies into every new worker.
+The request profile reports the physical read-ahead bytes and positional read
+count. Initial and final descriptor identity checks reject an artifact changed
+during the scan. A missing/stale/invalid serialized module
 still reads, validates, compiles, and republishes the complete wasm artifact.
 The proactive compiler also creates that serialization immediately after source
 compilation, keeping first-worker native compilation off the request path.