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Re: [Chicken-users] Need help to figure out where this strange performan
Jörg F . Wittenberger
Re: [Chicken-users] Need help to figure out where this strange performance impact is coming from
Thu, 14 Jan 2016 11:10:36 +0100
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Am 13.01.2016 um 21:46 schrieb Christian Kellermann:
> * Christian Kellermann <address@hidden> [160113 21:44]:
>> * Jörg F. Wittenberger <address@hidden> [160113 12:38]:
>>> yesterday I found that simply having a (use mailbox) in some code had a
>>> huge impact (more than a factor of 3) at the performance of the
>>> resulting executable. Without using the mailbox stuff at all.
>>> Meanwhile I figured out that this has nothing at all to do with the
>>> mailbox egg. But _all_ with the use of srfi-1.
>> Hm which OS and architecture are you running this on? On my OpenBSD
>> amd64 system the two versions do fluctuate but are indistinguishable
>> when run a couple hundred times.
Really?! Commenting out this (use srfi-1) does not make a difference
I just double-checked with chicken rev 022dce82 (master built
yesterday). (Before I used rev 274e7afa.)
Additionally I tried now chicken 4.10.1 built from the tarball
distributed from call-cc.org. (I moved the installed version out of the
way for this test.)
All the same result: slowdown of roughly 4x (160:40).
OS: Debian stretch, ARMv7 Processor rev 10
Another try: Raspberry Pi, Raspberian. Similar results, about 60:20
>> I have used CHICKEN Version 4.10.1 (rev f36c19c) and compiled with
>> default options.
Used default option this time. (But see source - contains some
> Also -O5 does not make any difference.
Same here. Same strange slowdown.
Anybody else having another platform to try on? An ARM-related problem?