[REQUEST] Suggestion to improve perf / HLSL

[yoyofr]

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• [x] This question is NOT about the Android apps in the Play Store
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General Request

Your Request

Hi, I'm currently integrating ProjectM in an iOS app, Modizer. it's working quite well but I'm facing regular stuttering when switching preset. I went through #545 and did some profiling. Issue seems to be the following call in HLSL which eats a lot of CPU in the preset loading process: static inline double iss_strtod(const char * in, char ** end) (line 67 in hlslparser/src/Engine.cpp) It seems the overhead is huge. I tried to just call regular C strtod function instead and it seems to work fine so far, stuttering has gone. Not sure it is important to manage the C++ to C locale for that part. Edit:spoke too soon, stuttering has reduced but not fully, will do more troubleshooting.