Function _yieldFrame

js/decimation.js:100–102

()

// Time-based yield: only yield every ~100ms of wall time instead of every N iterations.
// In foreground tabs setTimeout(0) costs ~4ms; in background tabs it's throttled to ~1s.
// By yielding based on elapsed time we get ~10 yields per second in foreground (smooth progress)
// and minimal extra delay in background (~10 yields × 1s = ~10s overhead instead of ~200s).
let _lastYieldTime = 0;
function _shouldYield() {
  const now = performance.now();