// https://github.com/FastLED/FastLED/pull/1659
// benchmark of 100 calls to fill_gradient() for 2,400 LEDs

#include <FastLED.h>
#include "fill_gradient2.h"

#define kMatrixWidth 40
#define kMatrixHeight 60
#define NUM_LEDS ((kMatrixWidth) * (kMatrixHeight))

CRGB leds[NUM_LEDS];

void setup() {
  FastLED.addLeds<WS2812B, 3, GRB>(leds, NUM_LEDS);
  FastLED.addLeds<WS2812B, 4, GRB>(leds, NUM_LEDS);
  Serial.begin(2000000);
  Serial.println("Please wait ~3 seconds for benchmarking.");
}

void loop() {
  const int iterations = 100;
  uint8_t huestart = random() * 255;
  uint8_t hueend = random() * 255;

  uint32_t orig_us1 = micros();
  for (uint32_t i = 0; i < iterations; i++)
    fill_gradient(leds, NUM_LEDS, CHSV(huestart, 255, 255), CHSV(hueend, 255, 255), FORWARD_HUES);
  uint32_t orig_us2 = micros();
  FastLED[0].showLeds();

  uint32_t fix_us1 = micros();
  for (uint32_t i = 0; i < iterations; i++)
    fill_gradient2(leds, NUM_LEDS, CHSV(huestart, 255, 255), CHSV(hueend, 255, 255), FORWARD_HUES);
  uint32_t fix_us2 = micros();
  FastLED[1].showLeds();

  Serial.print(float(orig_us2 - orig_us1) / iterations);
  Serial.print("μs vs ");
  Serial.print(float(fix_us2 - fix_us1) / iterations);
  Serial.print("μs  % change: ");
  Serial.println(float(fix_us2 - fix_us1) / float(orig_us2 - orig_us1) * 100.f - 100.f);
}