From 6b25e2373b4f7b150fbb377ef93d5ec3a145420b Mon Sep 17 00:00:00 2001
From: ownedbywuigi <ownedbywuigi@gmail.com>
Date: Sat, 28 Mar 2026 08:48:09 +0000
Subject: [PATCH] Update JIT options and thresholds for improved performance

---
 application/basilisk/app/profile/basilisk.js | 9 +++++++++
 js/src/jit/IonOptimizationLevels.cpp         | 2 +-
 js/src/jit/IonOptimizationLevels.h           | 4 ++--
 js/src/jit/JitOptions.cpp                    | 2 +-
 4 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/application/basilisk/app/profile/basilisk.js b/application/basilisk/app/profile/basilisk.js
index 36b5aac6b5..10c57ff75b 100644
--- a/application/basilisk/app/profile/basilisk.js
+++ b/application/basilisk/app/profile/basilisk.js
@@ -446,6 +446,15 @@ pref("browser.ghostbuster.enabled",               true);
 // misbehave. Should also avoid spurious GCs during ghostbusting.
 pref("javascript.options.gc_on_memory_pressure",  false);
 
+pref("javascript.options.baselinejit.unsafe_eager_compilation", false);
+pref("javascript.options.ion.unsafe_eager_compilation", false);
+pref("javascript.options.baselinejit.threshold", 4);
+pref("javascript.options.ion.threshold", 25);
+pref("javascript.options.mem.high_water_mark", 256);
+pref("javascript.options.mem.gc_incremental", false);
+pref("javascript.options.mem.gc_compacting", false);
+pref("javascript.options.mem.gc_incremental_slice_ms", 40);
+
 // This is the pref to control the location bar, change this to true to
 // force this - this makes the origin of popup windows more obvious to avoid
 // spoofing. We would rather not do it by default because it affects UE for web
diff --git a/js/src/jit/IonOptimizationLevels.cpp b/js/src/jit/IonOptimizationLevels.cpp
index f5cfb4ebaf..b3887f01cc 100644
--- a/js/src/jit/IonOptimizationLevels.cpp
+++ b/js/src/jit/IonOptimizationLevels.cpp
@@ -48,7 +48,7 @@ OptimizationInfo::initNormalOptimizationInfo()
     smallFunctionMaxInlineDepth_ = 10;
     compilerWarmUpThreshold_ = CompilerWarmupThreshold;
     compilerSmallFunctionWarmUpThreshold_ = CompilerSmallFunctionWarmupThreshold;
-    inliningWarmUpThresholdFactor_ = 0.125;
+    inliningWarmUpThresholdFactor_ = 0.10;
     inliningRecompileThresholdFactor_ = 4;
 }
 
diff --git a/js/src/jit/IonOptimizationLevels.h b/js/src/jit/IonOptimizationLevels.h
index 37ed713dc8..37a597e080 100644
--- a/js/src/jit/IonOptimizationLevels.h
+++ b/js/src/jit/IonOptimizationLevels.h
@@ -128,14 +128,14 @@ class OptimizationInfo
     uint32_t compilerWarmUpThreshold_;
 
     // Default compiler warmup threshold, unless it is overridden.
-    static const uint32_t CompilerWarmupThreshold = 1000;
+    static const uint32_t CompilerWarmupThreshold = 700;
 
     // How many invocations or loop iterations are needed before small functions
     // are compiled.
     uint32_t compilerSmallFunctionWarmUpThreshold_;
 
     // Default small function compiler warmup threshold, unless it is overridden.
-    static const uint32_t CompilerSmallFunctionWarmupThreshold = 100;
+    static const uint32_t CompilerSmallFunctionWarmupThreshold = 40;
 
     // How many invocations or loop iterations are needed before calls
     // are inlined, as a fraction of compilerWarmUpThreshold.
diff --git a/js/src/jit/JitOptions.cpp b/js/src/jit/JitOptions.cpp
index a8212fe452..c9b940a137 100644
--- a/js/src/jit/JitOptions.cpp
+++ b/js/src/jit/JitOptions.cpp
@@ -168,7 +168,7 @@ DefaultJitOptions::DefaultJitOptions()
     SET_DEFAULT(osrPcMismatchesBeforeRecompile, 6000);
 
     // The bytecode length limit for small function.
-    SET_DEFAULT(smallFunctionMaxBytecodeLength_, 130);
+    SET_DEFAULT(smallFunctionMaxBytecodeLength_, 200);
 
     // An artificial testing limit for the maximum supported offset of
     // pc-relative jump and call instructions.