[squeak-dev] The Trunk: Kernel-mt.1411.mcz
commits at source.squeak.org
commits at source.squeak.org
Fri Oct 8 07:02:16 UTC 2021
Marcel Taeumel uploaded a new version of Kernel to project The Trunk:
http://source.squeak.org/trunk/Kernel-mt.1411.mcz
==================== Summary ====================
Name: Kernel-mt.1411
Author: mt
Time: 27 August 2021, 8:38:24.862421 am
UUID: e7c0282d-0324-9342-bd98-477a1ef9a696
Ancestors: Kernel-mt.1410
Move the #round(Up|Down)To: changes down to Integer to not slow-down rounding for Float and Fraction. This also speeds it up a tiny bit more because it is now "inlined" without the extra send to #round(Up|Down)ToInteger:.
Thanks to Levente (ul) for the suggestion! (http://lists.squeakfoundation.org/pipermail/squeak-dev/2021-August/216272.html)
14x speed up of #roundTo: using the same strategy.
[65 roundUpTo: 64] bench
AFTER '31,000,000 per second. 32.2 nanoseconds per run. 0 % GC time.'
BEFORE '2,120,000 per second. 472 nanoseconds per run. 0.73985 % GC time.'
=============== Diff against Kernel-eem.1408 ===============
Item was added:
+ ----- Method: Integer>>roundDownTo: (in category 'truncation and round off') -----
+ roundDownTo: aNumber
+ "Overwritten to speed-up integer rounding via modulo instead of using intermediate fractions."
+
+ aNumber isInteger ifFalse: [^ super roundDownTo: aNumber].
+ ^ self - (self \\ aNumber)!
Item was added:
+ ----- Method: Integer>>roundTo: (in category 'truncation and round off') -----
+ roundTo: aNumber
+ "Overwritten to speed-up integer rounding via modulo instead of using intermediate fractions."
+
+ | rem |
+ aNumber isInteger ifFalse: [^ super roundUpTo: aNumber].
+
+ (rem := self \\ aNumber) = 0 ifTrue: [^ self].
+ ^ rem < (aNumber // 2)
+ ifTrue: ["round down" self - rem]
+ ifFalse: ["round up" self + aNumber - rem]!
Item was added:
+ ----- Method: Integer>>roundUpTo: (in category 'truncation and round off') -----
+ roundUpTo: aNumber
+ "Overwritten to speed-up integer rounding via modulo instead of using intermediate fractions."
+
+ | rem |
+ aNumber isInteger ifFalse: [^ super roundUpTo: aNumber].
+ ^ (rem := self \\ aNumber) ~= 0
+ ifTrue: [self + aNumber - rem]
+ ifFalse: [self]!
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