PerfDisc.ino

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// @filter: (memory is low)
// The benchmark's 768 B framebuffer requires more than 1 KB SRAM with stack.
 
#include <Arduino.h>
#include <FastLED.h>
#include <fl/gfx/gfx.h>
 
#define NUM_LEDS 1
#ifndef PIN_DATA
#define PIN_DATA 3
#endif
 
CRGB leds[NUM_LEDS];
 
// 32x8 = 256 pixels = 768 bytes — fits AVR 2KB RAM with room for stack.
static const int W = 32;
static const int H = 8;
static CRGB canvas_buf[W * H];
 
void setup() {
    Serial.begin(115200);
    FastLED.addLeds<NEOPIXEL, PIN_DATA>(leds, NUM_LEDS);
    delay(500);
    Serial.println(F("\n--- PerfDisc AVR Benchmark ---"));
}
 
void loop() {
    fl::CanvasRGB canvas(fl::span<CRGB>(canvas_buf, W * H), W, H);
    const int ITERS = 100;
 
    // Blend mode — radius 6 (spans ~12px)
    unsigned long t0 = micros();
    for (int i = 0; i < ITERS; i++) {
        canvas.drawDisc(CRGB::Blue, 16, 4, 6, fl::DrawMode::DRAW_MODE_BLEND);
    }
    unsigned long t1 = micros();
    unsigned long bl_r6 = (t1 - t0) / ITERS;
 
    // Blend mode — radius 10 (spans ~20px)
    t0 = micros();
    for (int i = 0; i < ITERS; i++) {
        canvas.drawDisc(CRGB(255, 255, 255), 16, 4, 10, fl::DrawMode::DRAW_MODE_BLEND);
    }
    t1 = micros();
    unsigned long bl_r10 = (t1 - t0) / ITERS;
 
    Serial.print(F("BL r6: ")); Serial.print(bl_r6); Serial.println(F(" us"));
    Serial.print(F("BL r10: ")); Serial.print(bl_r10); Serial.println(F(" us"));
    Serial.println(F("---"));
 
    delay(3000);
}