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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 13:15:23 +0100
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Still somebody having another architecture available is needed to track
this further down.
However I got more infos to share:
Wild guess: this may be some alignment problem.
It does _not_ have to do with anything to do with srfi-1. It just needs
to have *enough* exports in the program.
The story so far: Profiling with srfi-1 pulled inline did reveal no
calls to srfi-1. Turned the inlined srfi-1 into a module with no
exports -> slow down. Export * -> full speed. Binary search cutting
the export list -> slow down when less then 17 bindings exported. Does
not matter which 17 bindings. Rewrote the test to not import "extras"
-> still fast. Removed the "(use extras)" -> slow down. Use random egg
exporting many bindings instead -> fast again.
Am 14.01.2016 um 12:12 schrieb Christian Kellermann:
> * Jörg F. Wittenberger <address@hidden> [160114 11:30]:
>> Tried that too: on AMD64 (Debian) chicken 4.10.1 from tarball does NOT
>> give any difference.
>> But even if it may be an ARM related problem: how is it even possible??!
> So next let's isolate whether it's the architecture (ARM
> vs. world)type or the word size (32bit vs 64bit). Can anyone with a
> 32bit system try that please?
> May you be peaceful, may you live in safety, may you be free from
> suffering, and may you live with ease.