Marco Gaido 64c314e22f [SPARK-25317][CORE] Avoid perf regression in Murmur3 Hash on UTF8String ... ## What changes were proposed in this pull request? SPARK-10399 introduced a performance regression on the hash computation for UTF8String. The regression can be evaluated with the code attached in the JIRA. That code runs in about 120 us per method on my laptop (MacBook Pro 2.5 GHz Intel Core i7, RAM 16 GB 1600 MHz DDR3) while the code from branch 2.3 takes on the same machine about 45 us for me. After the PR, the code takes about 45 us on the master branch too. ## How was this patch tested? running the perf test from the JIRA Closes #22338 from mgaido91/SPARK-25317. Authored-by: Marco Gaido <marcogaido91@gmail.com> Signed-off-by: Wenchen Fan <wenchen@databricks.com>		2018-09-06 15:27:59 +08:00
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kvstore	Fix typos detected by github.com/client9/misspell	2018-08-11 21:23:36 -05:00
network-common	[SPARK-25218][CORE] Fix potential resource leaks in TransportServer and SocketAuthHelper	2018-08-28 08:36:06 -07:00
network-shuffle	[SPARK-24296][CORE] Replicate large blocks as a stream.	2018-08-21 11:26:41 -07:00
network-yarn	[SPARK-23028] Bump master branch version to 2.4.0-SNAPSHOT	2018-01-13 00:37:59 +08:00
sketch	[SPARK-23381][CORE] Murmur3 hash generates a different value from other implementations	2018-02-16 17:17:55 -08:00
tags	[SPARK-23028] Bump master branch version to 2.4.0-SNAPSHOT	2018-01-13 00:37:59 +08:00
unsafe	[SPARK-25317][CORE] Avoid perf regression in Murmur3 Hash on UTF8String	2018-09-06 15:27:59 +08:00