From 9f8eb326af824bba1ff9d12d7c0561748b72a8bb Mon Sep 17 00:00:00 2001
From: serge-sans-paille <sguelton@mozilla.com>
Date: Tue, 9 Apr 2024 18:05:58 +0000
Subject: [PATCH] Bug 1890540 - Avoid redundant computation of iid_bytes during
 xpt codegen r=mccr8

Differential Revision: https://phabricator.services.mozilla.com/D207031
---
 xpcom/reflect/xptinfo/xptcodegen.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/xpcom/reflect/xptinfo/xptcodegen.py b/xpcom/reflect/xptinfo/xptcodegen.py
index 3f27009b9dee..1e2cfcb14888 100644
--- a/xpcom/reflect/xptinfo/xptcodegen.py
+++ b/xpcom/reflect/xptinfo/xptcodegen.py
@@ -9,6 +9,7 @@ import json
 from collections import OrderedDict
 
 import buildconfig
+from mozbuild.util import memoize
 from perfecthash import PerfectHash
 
 # Pick a nice power-of-two size for our intermediate PHF tables.
@@ -135,6 +136,7 @@ def split_iid(iid):  # Get the individual components out of an IID string.
     return tuple(split_at_idxs(iid, (8, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2)))
 
 
+@memoize
 def iid_bytes(iid):  # Get the byte representation of the IID for hashing.
     bs = bytearray()
     for num in split_iid(iid):