Re: FFI Performance
- From: Mike Pall <mike-1502@xxxxxxxxxx>
- To: luajit@xxxxxxxxxxxxx
- Date: Mon, 16 Feb 2015 11:19:09 +0100
Niklas Frykholm wrote:
> It seems like the JIT FFI path hits some pathological case that leads to
> very bad performance. Any idea what this might be?
This is unlikely, because this example is so simple.
Check the output of -jv or the equivalent:
require("jit.v").start("output.txt")
Maybe the JIT compiler has trouble allocating executable memory on
Android? There was a report of this happening with a Tegra chipset,
where the whole virtual memory address range was polluted with tiny
blobs.
OTOH ... how did you test? An individual test run for each case or
a shared test loop?
--Mike
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