Enable prehashing of j.l.Thread and Class #15444
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Pre-tenured objects like Thread and Class do not get moved as often by the GC which means that it would take longer for it to grow a hash slot. This would require the VM to take the slow path for retrieving the hashcode until the hash slot is grown. Pre-hashing these objects addresses this problem. Signed-off-by: Tobi Ajila <atobia@ca.ibm.com>
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@pshipton Whats the rule on copyrights with files like these? |
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There is no copyright and you don't need to add one. The copyright check failure can be ignored. |
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jenkins test sanity,sanity.openjdk,sanity.system all jdk8,jdk11,jdk17 |
pshipton
approved these changes
Jun 29, 2022
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Enable prehashing of j.l.Thread and Class
Pre-tenured objects like Thread and Class do not get moved as often by
the GC which means that it would take longer for it to grow a hash slot.
This would require the VM to take the slow path for retrieving the
hashcode until the hash slot is grown. Pre-hashing these objects
addresses this problem.
Signed-off-by: Tobi Ajila atobia@ca.ibm.com