tor-browser

commit 43f63773ead36135608ade38c20b257117f4152e
parent 8edd09b089865a34ef87c8adccaa75b6060f6c7d
Author: Bryan Thrall <bthrall@mozilla.com>
Date:   Thu, 11 Dec 2025 16:25:34 +0000

Bug 2000849 - Raise smallFunctionMaxBytecodeLength default to 140 r=iain

The changes from bug 1966196 increased the bytecode size of some scripts past
this limit.

In particular, the Jetstream3 test raytrace-private-class-fields could no
longer inline its 'Vector' function, which reduced performance.

Differential Revision: https://phabricator.services.mozilla.com/D275863

Diffstat:
M
js/src/jit/JitOptions.cpp
 | 
2
+-
M
modules/libpref/init/StaticPrefList.yaml
 | 
2
+-

2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/js/src/jit/JitOptions.cpp b/js/src/jit/JitOptions.cpp
@@ -271,7 +271,7 @@ DefaultJitOptions::DefaultJitOptions() {
   SET_DEFAULT(osrPcMismatchesBeforeRecompile, 6000);
 
   // The bytecode length limit for small function.
-  SET_DEFAULT(smallFunctionMaxBytecodeLength, 130);
+  SET_DEFAULT(smallFunctionMaxBytecodeLength, 140);
 
   // The minimum entry count for an IC stub before it can be trial-inlined.
   SET_DEFAULT(inliningEntryThreshold, 100);
diff --git a/modules/libpref/init/StaticPrefList.yaml b/modules/libpref/init/StaticPrefList.yaml
@@ -8880,7 +8880,7 @@
 # NOTE: These must match JitOptions defaults.
 - name: javascript.options.inlining_bytecode_max_length
   type: uint32_t
-  value: 130
+  value: 140
   mirror: always
   do_not_use_directly: true