tor

commit c32108ee0fea851ced14f71d842390992f762393
parent ae4e5b98245169dc02c12138d4acc69ce7da0261
Author: Nick Mathewson <nickm@torproject.org>
Date:   Tue, 17 Apr 2018 09:14:44 -0400

Merge remote-tracking branch 'public/bug24688'

Diffstat:
A
changes/bug24688
 | 
3
+++
M
src/common/timers.c
 | 
5
+++++

2 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/changes/bug24688 b/changes/bug24688
@@ -0,0 +1,3 @@
+  o Minor features (performance, 32-bit):
+    - Make our timing-wheel code run a tiny bit faster on 32-bit platforms,
+      by preferring 32-bit math to 64-bit. Closes ticket 24688.
diff --git a/src/common/timers.c b/src/common/timers.c
@@ -64,6 +64,11 @@ struct timeout_cb {
  * above TIMEOUT_MAX can also be super-inefficient. Choosing 5 here sets
  * timeout_max to 2^30 ticks, or 29 hours with our value for USEC_PER_TICK */
 #define WHEEL_NUM 5
+#if SIZEOF_VOID_P == 4
+/* On 32-bit platforms, we want to override wheel_bit, so that timeout.c will
+ * use 32-bit math. */
+#define WHEEL_BIT 5
+#endif
 #include "src/ext/timeouts/timeout.c"
 
 static struct timeouts *global_timeouts = NULL;