From: Nickolas Lloyd <ultrageek.lloyd@gmail.com>
Date: Sun, 1 Jan 2017 19:02:26 +0000 (-0500)
Subject: ; Fix a performance regression in bytecode JIT compiler
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=1b8bb2df51067b2123a92c63bdbed03389c036b8;p=emacs.git

; Fix a performance regression in bytecode JIT compiler

; * src/bytecode-jit.c: Make `functions' array static const to allow the
compiler to elide the array accesses.  This brings `jit_byte_code__'
performance back in line with the more explicit, repetitive
pre-639dfad3ae2a478652a399986b03e5eec219eab1 version.
---

diff --git a/src/bytecode-jit.c b/src/bytecode-jit.c
index 859df8b7c42..6ab73492195 100644
--- a/src/bytecode-jit.c
+++ b/src/bytecode-jit.c
@@ -781,7 +781,7 @@ struct {
   void * const ptr;
   const char * const name;
   int n;
-} functions[256] = {
+} static const functions[256] = {
 #undef DEFINE_FIXED
 #define DEFINE_FIXED(bname, value, fname, num) \
   [value] = { .ptr = (void *)(&fname), .name = #fname, .n = num },