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On Sep 28, 2016, at 3:43 AM, Viacheslav Usov <via.usov@gmail.com> wrote:

On Wed, Sep 28, 2016 at 8:19 AM, Dane Springmeyer <dane@mapbox.com> wrote:

> In osrm-backend lua is embedded and called from C++. The section of code that is running slower with lua 5.3, compared to 5.2.4, is https://github.com/Project-OSRM/osrm-backend/blob/master/src/extractor/extractor.cpp#L184-L208.

Your message is basically asking somebody on this list to debug/profile that complicated beast composed of C++ and Lua.

Sorry, that is not my intention. I'm working on reducing my test case, but at this point I am just looking for ideas, not direct debugging help.

There might still be volunteers, but I'd say you should isolate this problem to something comprehensible to people familiar with C/C++ and Lua, but not necessarily with your project.

I will post back if I am able to do that.