From 3f4f049ac015c695a965142e7b1180eae83ae781 Mon Sep 17 00:00:00 2001
From: lichao <lichao@aiotlink.com>
Date: 星期四, 25 三月 2021 16:18:26 +0800
Subject: [PATCH] reason for speed change; refactor.
---
src/shm_queue.cpp | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/src/shm_queue.cpp b/src/shm_queue.cpp
index 1446446..f770afc 100644
--- a/src/shm_queue.cpp
+++ b/src/shm_queue.cpp
@@ -48,8 +48,6 @@
bool ShmMsgQueue::Send(const MQId &remote_id, const Msg &msg, const int timeout_ms)
{
Queue *remote = find(MsgQIdToName(remote_id));
-
- return remote && remote->Write(msg, timeout_ms);
if(!remote) {
return false;
@@ -65,6 +63,11 @@
bool ShmMsgQueue::Send(const MQId &remote_id, const void *data, const size_t size, const int timeout_ms)
{
+ // Test shows that in the 2 cases:
+ // 1) build msg first, then find remote queue;
+ // 2) find remote queue first, then build msg;
+ // 1 is about 50% faster than 2, maybe cache related.
+
Msg msg;
if (msg.Build(shm(), Id(), data, size, false)) {
if (Send(remote_id, msg, timeout_ms)) {
--
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