Bug 1417806 - Reduce gPrefNameArena's alignment to 1. r=glandium.
Because it holds 8-bit strings, which only need 1 byte alignment.
For the profile on my Linux box, in every process this reduces the size of the
arena by 1 chunk, from 120 KiB to 112 KiB.
MozReview-Commit-ID: 8ozrLIq5ZZ4
--- a/modules/libpref/Preferences.cpp
+++ b/modules/libpref/Preferences.cpp
@@ -312,17 +312,17 @@ struct CallbackNode
PrefChangedFunc mFunc;
void* mData;
Preferences::MatchKind mMatchKind;
CallbackNode* mNext;
};
static PLDHashTable* gHashTable;
-static ArenaAllocator<8192, 4> gPrefNameArena;
+static ArenaAllocator<8192, 1> gPrefNameArena;
// The callback list contains all the priority callbacks followed by the
// non-priority callbacks. gLastPriorityNode records where the first part ends.
static CallbackNode* gFirstCallback = nullptr;
static CallbackNode* gLastPriorityNode = nullptr;
static bool gIsAnyPrefLocked = false;
