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Optimize away IOBuf clones on hot path
author
Jon Maltiel Swenson
<jmswen@fb.com>
Wed, 27 Apr 2016 01:12:20 +0000
(18:12 -0700)
committer
Facebook Github Bot 5
<facebook-github-bot-5-bot@fb.com>
Wed, 27 Apr 2016 01:20:24 +0000
(18:20 -0700)
Summary:
'get' is the most frequent memcached operation. On a get reply, we should go to heap
as little as possible. This diff optimizes for this scenario, where replies
have only one IOBuf field.
Reviewed By: pavlo-fb
Differential Revision:
D3226592
fb-gh-sync-id:
92e1a1fac5735bd268691cf11990a96ae6fa8309
fbshipit-source-id:
92e1a1fac5735bd268691cf11990a96ae6fa8309
folly/io/Cursor.h
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diff --git
a/folly/io/Cursor.h
b/folly/io/Cursor.h
index 3cf369e9ece27298ffa7eb2bf35a225bc83152a8..a13092394a557781a9e420bc152ff3c592a64fd1 100644
(file)
--- a/
folly/io/Cursor.h
+++ b/
folly/io/Cursor.h
@@
-913,6
+913,10
@@
class QueueAppender : public detail::Writable<QueueAppender> {
}
}
+ void insert(const folly::IOBuf& buf) {
+ insert(buf.clone());
+ }
+
private:
folly::IOBufQueue* queue_;
size_t growth_;