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Opened 8 years ago

Closed 8 years ago

#13239 closed enhancement (fixed)

[Patch] Java 8: MapCSS Condition class

Reported by: michael2402 Owned by: team
Priority: normal Milestone: 16.07
Component: Core mappaint Version:
Keywords: gsoc-core java8 Cc: Don-vip, bastiK, stoecker

Description

The switch/case in conditions can be removed by using lambda expressions

The speed is not affected by this (the JIT can produce similar assembly code in both cases)

I noticed a small decrease in floating point performance, I think this happens because of the nested lambdas. It is less than 5%, so probably OK.

Performance of EQ seems to have improved extremely (~4 times compared to NEQ). This is because of the JIT thinking that that call is special and optimizing/inlining it. If you change the order of the Ops that are used before the JIT jumps in, you get an other fast entry ;-).

Attachments (1)

patch-mapcss-java8-condition.patch​ (17.7 KB ) - added by michael2402 8 years ago.

Download all attachments as: .zip

Change History (3)

by michael2402, 8 years ago

Attachment: patch-mapcss-java8-condition.patch​ added

comment:1 by Don-vip, 8 years ago

Milestone: 16.08 → 16.07

comment:2 by Don-vip, 8 years ago

Resolution: → fixed
Status: new → closed

In 10674/josm:

fix #13239, fix #13240 - Java 8: MapCSS Condition class (patches by michael2402) - gsoc-core

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