Fix crash in CJS (#3294)bun-v0.6.9

* Fix crash in CJS

* Add std.heap.ArenaAllocator

* Use our arena allocator

* Reduce JS parser memory usage and make HMR faster

* Write some comments

* fix test failure & clean up this code

* Update javascript.zig

* make arena usage safer

---------

Co-authored-by: Jarred Sumner <709451+Jarred-Sumner@users.noreply.github.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/bun.js/bindings/ZigGlobalObject.h b/src/bun.js/bindings/ZigGlobalObject.h
index 3cf88bf29..d5f933540 100644
--- a/src/bun.js/bindings/ZigGlobalObject.h
+++ b/src/bun.js/bindings/ZigGlobalObject.h
@@ -388,6 +388,12 @@ public:
     BunPlugin::OnResolve onResolvePlugins[BunPluginTargetMax + 1] {};
     BunPluginTarget defaultBunPluginTarget = BunPluginTargetBun;
 
+    // This increases the cache hit rate for JSC::VM's SourceProvider cache
+    // It also avoids an extra allocation for the SourceProvider
+    // The key is a pointer to the source code
+    WTF::HashMap<uintptr_t, Ref<JSC::SourceProvider>> sourceProviderMap;
+    size_t reloadCount = 0;
+
     void reload();
 
     JSC::Structure* pendingVirtualModuleResultStructure() { return m_pendingVirtualModuleResultStructure.get(this); }