Just use one version of the scripts in both the browser and in SkV8.

experimental/SkV8Example/compare/gears.js

-var NumTeeth = 24;
-var Delta = Math.PI/90;
-var NumGears = 60;
-var FaceColors = ["#000099", "#006600", "#990000", "#EEEE00"];
-var SideColors = ["#0000FF", "#009900", "#FF0000", "#CCCC00"];
-
-
-function drawGear(ctx, r) {
-  var dT = Math.PI*2/NumTeeth;
-  var dTq = dT/4;
-  var outer = r;
-  var inner = 0.7 * r;
-  ctx.beginPath();
-  for (var i=0; i<NumTeeth; i+=2) {
-    ctx.lineTo(Math.sin(dT*i-dTq)*outer, Math.cos(dT*i-dTq)*outer);
-    ctx.lineTo(Math.sin(dT*i+dTq)*inner, Math.cos(dT*i+dTq)*inner);
-    ctx.lineTo(Math.sin(dT*(i+1)-dTq)*inner, Math.cos(dT*(i+1)-dTq)*inner);
-    ctx.lineTo(Math.sin(dT*(i+1)+dTq)*outer, Math.cos(dT*(i+1)+dTq)*outer);
-  }
-  ctx.closePath();
-  ctx.stroke();
-};
-
-function draw3DGear(ctx, angle, faceColor, sideColor, r) {
-  ctx.fillStyle = faceColor;
-  ctx.strokeStyle = sideColor;
-  ctx.rotate(angle);
-  drawGear(ctx, r);
-  for (var i=0; i < 20; i++) {
-    ctx.rotate(-angle);
-    ctx.translate(0.707, 0.707);
-    ctx.rotate(angle);
-    drawGear(ctx, r);
-  }
-  ctx.fill()
-  ctx.rotate(-angle);
-}
-
-function draw3DGearAt(ctx, x, y, r, angle, faceColor, sideColor) {
-  ctx.save();
-  ctx.translate(x, y);
-  draw3DGear(ctx, angle, faceColor, sideColor, r);
-  ctx.restore();
-}
-
-var anim = function() {
-  var canvas = document.getElementById('gears');
-  var ctx = canvas.getContext("2d");
-  var ticks=0;
-  var rotation = 0;
-  var gears = [];
-
-  for (var i=0; i<NumGears; i++) {
-    color = Math.floor(Math.random()*FaceColors.length);
-    gears.push({
-        x: Math.random()*500,
-        y: Math.random()*500,
-        r: Math.random()*100+5,
-        faceColor: FaceColors[color],
-        sideColor: SideColors[color]
-    });
-  }
-
-  function draw() {
-    ctx.resetTransform();
-    ctx.fillStyle = 'white';
-    ctx.fillRect(0, 0, ctx.canvas.width, ctx.canvas.height);
-
-    rotation += Delta;
-    if (rotation >= Math.PI*2) {
-      rotation = 0;
-    }
-
-    for (var i=0; i < gears.length; i++) {
-      draw3DGearAt(ctx, gears[i].x,  gears[i].y, gears[i].r, rotation,
-          gears[i].faceColor, gears[i].sideColor); }
-
-    ticks++;
-    requestAnimationFrame(draw);
-  }
-
-  requestAnimationFrame(draw);
-
-
-  function fps() {
-    console.log(ticks);
-    ticks = 0;
-  }
-
-  setInterval(fps, 1000);
-}();
-
-