Performance of Pattern Matching for switch (Third Preview)

[Jordan Zimmerman]

Hi Folks,

I've been experimenting with Pattern Matching for switch (Third Preview). I noticed that the performance of these enhanced switches is far worse than manual matching. Is this due to this only being a preview and optimizations have yet to be done? Anyway, I thought I'd mention what I found as an FYI.

Here's the jmh benchmark I used:
	
	https://gist.github.com/Randgalt/a68ceee62cd8127431cbe6e7afbfdf44 <https://gist.github.com/Randgalt/a68ceee62cd8127431cbe6e7afbfdf44>

Here are the results:

Benchmark                               Mode  Cnt      Score       Error  Units
TestEnhancedSwitch.testEnhancedSwitch  thrpt    5  30789.482 ± 17667.365  ops/s
TestEnhancedSwitch.testManualSwitch    thrpt    5  44651.612 ±  5135.641  ops/s

Cheers.

-Jordan
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mail.openjdk.org/pipermail/amber-dev/attachments/20220810/1eabacaa/attachment-0001.htm>