[erlang-questions] Performance measurement for er_zauker

[Pablo Polvorin]

I wrote a blog post time ago explaining a simple usage of fprof to discover
possible bottlenecks, maybe it can help you getting started.
http://blog.process-one.net/optimizing-erlang-applications-emysql/

 fprof is only one of many available profiling tools,  each has different
trade-offs.


On 31 July 2014 12:15, Dmitry Kolesnikov <dmkolesnikov@REDACTED> wrote:

> Hi,
>
> I am using https://github.com/virtan/eep
>
> - Dmitry
>
>
> On 31 Jul 2014, at 15:02, Giovanni Giorgi <jj@REDACTED> wrote:
>
> Hi all,
>
>  I am writing a code indexer called er_zaueker: it is based on erlang and
> redis: https://github.com/daitangio/er_zauker
>
>
> It is also my "erlang learning project".
>
> I am trying to optimize it.
>
> What are the OTP API I can use to find out where is spent much of the time?
>
> I need an aggregate timing value to find the slowest functions.
>
> er_zauker breaks the files in "trigram" and push them to redis. This part
> is done sequentially on a single file, whereas file processing is spread
> via a lot of processes.
>
> The entire work is higly I/O bound, but I hope to break the 10 files per
> second barrier soon.
>
> I'd like tu understang if it make sense to have more processes per single
> file.
>
> To collect trigram I am using the sets module, but I think R17 maps could
> be even more fast.
>
>
> ---
> Gio's Blog http://gioorgi.com
>
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-- 
Pablo Polvorin
ProcessOne
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