This will slightly speed up v8String().
Created attachment 177973 [details] Patch
Comment on attachment 177973 [details] Patch LGTM, but this looks to be causing IDB crashes.
SerializedScriptValue has methods like xxx(Isolate* isolate = 0), and the methods can pass 0 to v8Integer() or v8String(). We need to kill an optional isolate parameter first and guarantee that an isolate is not 0.
*** This bug has been marked as a duplicate of bug 107540 ***