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assets/webapps/membuster.gaiamobile.org/membuster.js

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+var arr = [];
+function bustSysmem() {
+  setInterval(allocChunk, 1000);
+}
+
+var chunks = [ ]; // root the chunks
+var nextChunkMB = 32;
+var totalAllocMB = 0;
+function allocChunk() {
+  var allocSizeMB = nextChunkMB * 1024 * 1024;
+  var array = new ArrayBuffer(allocSizeMB);
+
+  // Ensure all pages are committed.
+  var view = new Int32Array(array);
+  for (var j = 0; j < view.length; j += 1024) {
+    view[j] = 42;
+  }
+
+  totalAllocMB += nextChunkMB;
+  log("Allocated "+ nextChunkMB +"MB; total so far is "+ totalAllocMB+ "MB");
+
+  if (nextChunkMB > 1) {
+    nextChunkMB >>= 1
+  }
+
+  chunks.push(array);
+}
+
+function bustGfxmem() {
+  setInterval(allocCanvas, 1000);
+}
+
+var totalGfxMB = 0;
+function allocCanvas() {
+  var c = document.createElement("canvas");
+  // We want to allocate 1MB of gfx mem.  Canvases are double buffered
+  // and default to RGBA.  So we create one with 128K pixels.
+  var w = 128, h = 1024;
+  c.width = w;
+  c.height = h;
+
+  var ctx = c.getContext('2d');
+  ctx.clearRect(0, 0, w, h);
+  ctx.fillStyle = 'rgba(0, 0, 255, 0.1)';
+  ctx.rect(0, 0, w, h);
+  ctx.fill();
+
+  ++totalGfxMB;
+  log("Allocated 1MB gfx memory; total so far is ~"+ totalGfxMB +"MB");
+
+  document.getElementById("canvases").appendChild(c);
+}
+
+var logElt;
+function log(msg) {
+  if (!logElt) {
+    logElt = document.getElementById("log");
+  }
+  logElt.textContent = msg;
+  console.log(msg);
+}
+
+window.onload = function() {
+  document.getElementById("sys").onclick = function() { bustSysmem(); };
+  document.getElementById("gfx").onclick = function() { bustGfxmem(); };
+};