tests/stress/proxy-inline-cache.js

   1 var niters = 100000;
   2
   3 // proxy -> target -> x
   4 function cacheOnTarget() {
   5     var target = {x:42};
   6     var proxy = createProxy(target);
   7
   8     var getX = function(o) { return o.x; };
   9     noInline(getX);
  10
  11     var sum = 0;
  12     for (var i = 0; i < niters; ++i)
  13         sum += getX(proxy);
  14
  15     if (sum != 42 * niters)
  16         throw new Error("Incorrect result");
  17 };
  18
  19 // proxy -> target -> proto -> x
  20 function cacheOnPrototypeOfTarget() {
  21     var proto = {x:42};
  22     var target = Object.create(proto);
  23     var proxy = createProxy(target);
  24
  25     var getX = function(o) { return o.x; };
  26     noInline(getX);
  27
  28     var sum = 0;
  29     for (var i = 0; i < niters; ++i)
  30         sum += getX(proxy);
  31
  32     if (sum != 42 * niters)
  33         throw new Error("Incorrect result");
  34 };
  35
  36 // base -> proto (proxy) -> target -> x
  37 function dontCacheOnProxyInPrototypeChain() {
  38     var target = {x:42};
  39     var protoProxy = createProxy(target);
  40     var base = Object.create(protoProxy);
  41
  42     var getX = function(o) { return o.x; };
  43     noInline(getX);
  44
  45     var sum = 0;
  46     for (var i = 0; i < niters; ++i)
  47         sum += getX(base);
  48
  49     if (sum != 42 * niters)
  50         throw new Error("Incorrect result");
  51 };
  52
  53 // proxy -> target 1 -> proto (proxy) -> target 2 -> x
  54 function dontCacheOnTargetOfProxyInPrototypeChainOfTarget() {
  55     var target2 = {x:42};
  56     var protoProxy = createProxy(target2);
  57     var target1 = Object.create(protoProxy);
  58     var proxy = createProxy(target1);
  59
  60     var getX = function(o) { return o.x; };
  61     noInline(getX);
  62
  63     var sum = 0;
  64     for (var i = 0; i < niters; ++i)
  65         sum += getX(proxy);
  66
  67     if (sum != 42 * niters)
  68         throw new Error("Incorrect result");
  69 };
  70
  71 cacheOnTarget();
  72 cacheOnPrototypeOfTarget();
  73 dontCacheOnProxyInPrototypeChain();
  74 dontCacheOnTargetOfProxyInPrototypeChainOfTarget();