From d7459354f58d1b71fc0c5ec48de9242e6a2fd00c Mon Sep 17 00:00:00 2001 From: Subv Date: Mon, 25 Sep 2017 13:06:42 -0500 Subject: Audio: Use std::deque instead of std::vector for the audio buffer type (StereoBuffer16). The current code inserts and deletes elements from the beginning of the audio buffer, which is very inefficient in an std::vector. Profiling was done using VisualStudio2017's Performance Analyzer in Super Mario 3D Land. Before this change: AudioInterp::Linear had 14.14% of the runtime (inclusive) and most of that time was spent in std::vector's insert implementation. After this change: AudioInterp::Linear has 0.36% of the runtime (inclusive) --- src/audio_core/interpolate.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'src/audio_core/interpolate.cpp') diff --git a/src/audio_core/interpolate.cpp b/src/audio_core/interpolate.cpp index 16e68bc5c..83573d772 100644 --- a/src/audio_core/interpolate.cpp +++ b/src/audio_core/interpolate.cpp @@ -47,7 +47,7 @@ static void StepOverSamples(State& state, StereoBuffer16& input, float rate, state.xn1 = input[inputi + 1]; state.fposition = fposition - inputi * scale_factor; - input.erase(input.begin(), input.begin() + inputi + 2); + input.erase(input.begin(), std::next(input.begin(), inputi + 2)); } void None(State& state, StereoBuffer16& input, float rate, DSP::HLE::StereoFrame16& output, -- cgit v1.2.3