snapshot

libraries/audio-tools/examples/tests/performance/sine/sine.ino

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+
+#include "AudioTools.h"
+
+SineWaveGenerator<int16_t> sine_wave(32000);      // subclass of SoundGenerator with max amplitude of 32000
+SineFromTable<int16_t> sine_table(32000);         // subclass of SoundGenerator with max amplitude of 32000
+FastSineGenerator<int16_t> sine_fast(32000);  
+
+size_t measure(SoundGenerator<int16_t> *gen){
+    uint64_t start = millis();
+    size_t count = 0;
+    for(int i=0;i<1000000;i++){
+        int16_t s = gen->readSample();
+    }
+    uint64_t timeMs = millis()-start;
+    // calculate samples per second
+    return 1000000.0 / timeMs *1000;
+}
+
+const char* resultStr(const char* name, size_t count){
+    static char msg[160];
+    sprintf(msg, "%s: %ld", name, count);
+    return msg;
+}
+
+void setup(){
+    Serial.begin(115200);
+    Serial.print("Number of samples per sec");
+}
+
+void loop(){
+    Serial.print(resultStr("SineWaveGenerator", measure(&sine_wave)));
+    Serial.print(" - ");
+    Serial.print(resultStr("SineFromTable", measure(&sine_table)));
+    Serial.print(" - ");
+    Serial.print(resultStr("FastSineGenerator", measure(&sine_fast)));
+    Serial.println();
+}