onload = function() {
var div = document.getElementById("benchmark"),
bench = new Benchmark(),
output = [],
common = [],
bestlap = [],
temporary = new Array(5000 + parseInt(Math.random()*2109));
// author
output.push("© Web Reflection Blog
");
// loop benchmark
common = [];
output.push("");
output.push("
for loop (i++) without any optimizzations
", "for(i = 0; i < temporary.length; i++)
");
bench.start();
for(i = 0; i < temporary.length; i++)
common.push({id:i,name:"test".concat(i)});
output.push("Time elapsed: ", bench.getTime(), " seconds
for ", common.length, " push operations
");
output.push("");
bestlap.push(bench.getTime());
common = [];
output.push("");
output.push("
for loop (i++) with local variables
", "for(var i = 0; i < temporary.length; i++)
");
bench.start();
for(var i = 0; i < temporary.length; i++)
common.push({id:i,name:"test".concat(i)});
output.push("Time elapsed: ", bench.getTime(), " seconds
for ", common.length, " push operations
");
output.push("");
bestlap.push(bench.getTime());
common = [];
output.push("");
output.push("
for loop (i++) with optimizzations
", "for(var i = 0, j = temporary.length; i < j; i++)
");
bench.start();
for(var i = 0, j = temporary.length; i < j; i++)
common.push({id:i,name:"test".concat(i)});
output.push("Time elapsed: ", bench.getTime(), " seconds
for ", common.length, " push operations
");
output.push("");
bestlap.push(bench.getTime());
common = [];
output.push("");
output.push("
for loop (++i) with optimizzations
", "for(var i = 0, j = temporary.length; i < j; ++i)
");
bench.start();
for(var i = 0, j = temporary.length; i < j; ++i)
common.push({id:i,name:"test".concat(i)});
output.push("Time elapsed: ", bench.getTime(), " seconds
for ", common.length, " push operations
");
output.push("");
bestlap.push(bench.getTime());
common = [];
output.push("");
output.push("
while loop (i++) without optimizzations
", "i = 0; while(i < temporary.length)
");
bench.start();
i = 0;
while(i < temporary.length) {
common.push({id:i,name:"test".concat(i)});
i++;
}
output.push("Time elapsed: ", bench.getTime(), " seconds
for ", common.length, " push operations
");
output.push("");
bestlap.push(bench.getTime());
common = [];
output.push("");
output.push("
while loop (i++) with optimizzations
", "var i = 0, j = temporary.length; while(i < j)
");
bench.start();
var i = 0, j = temporary.length;
while(i < j) {
common.push({id:i,name:"test".concat(i)});
i++;
}
output.push("Time elapsed: ", bench.getTime(), " seconds
for ", common.length, " push operations
");
output.push("");
bestlap.push(bench.getTime());
common = [];
output.push("");
output.push("
while loop (++i) with optimizzations
", "var i = 0, j = temporary.length; while(i < j)
");
bench.start();
var i = 0, j = temporary.length;
while(i < j) {
common.push({id:i,name:"test".concat(i)});
++i;
}
output.push("Time elapsed: ", bench.getTime(), " seconds
for ", common.length, " push operations
");
output.push("");
bestlap.push(bench.getTime());
common = [];
output.push("");
output.push("
for loop (i--) without any optimizzations
", "for(i = temporary.length - 1; i >= 0; i--)
");
bench.start();
for(i = temporary.length - 1; i >= 0; i--)
common.push({id:i,name:"test".concat(i)});
output.push("Time elapsed: ", bench.getTime(), " seconds
for ", common.length, " push operations
");
output.push("");
bestlap.push(bench.getTime());
common = [];
output.push("");
output.push("
for loop (i--) with optimizzations
", "for(var i = temporary.length - 1; i > -1; i--)
");
bench.start();
for(var i = temporary.length - 1; i > -1; i--)
common.push({id:i,name:"test".concat(i)});
output.push("Time elapsed: ", bench.getTime(), " seconds
for ", common.length, " push operations
");
output.push("");
bestlap.push(bench.getTime());
common = [];
output.push("");
output.push("
for loop (--i) with optimizzations
", "for(var i = temporary.length - 1; i >= 0; --i)
");
bench.start();
for(var i = temporary.length - 1; i >= 0; --i)
common.push({id:i,name:"test".concat(i)});
output.push("Time elapsed: ", bench.getTime(), " seconds
for ", common.length, " push operations
");
output.push("");
bestlap.push(bench.getTime());
common = [];
output.push("");
output.push("
while loop (i--) with optimizzations
", "var i = temporary.length; while(i--)
");
bench.start();
var i = temporary.length;
while(i--)
common.push({id:i,name:"test".concat(i)});
output.push("Time elapsed: ", bench.getTime(), " seconds
for ", common.length, " push operations
");
output.push("");
bestlap.push(bench.getTime());
common = [];
output.push("");
output.push("
while loop (--i) with optimizzations
", "var i = temporary.length; while(i)
");
bench.start();
var i = temporary.length;
while(i) {
--i;
common.push({id:i,name:"test".concat(i)});
}
output.push("Time elapsed: ", bench.getTime(), " seconds
for ", common.length, " push operations
");
output.push("");
bestlap.push(bench.getTime());
// fast duff ???
common = [];
output.push("");
output.push("
kentaromiura fastest device (duff's device optimized)
", "var i = temporary.length; .... --i every 8 index
");
bench.start();
var i = temporary.length;
if(parseInt(i/8)) {
var j=i%8;
do {
--i; common.push({id:i,name:"test".concat(i)});
--i; common.push({id:i,name:"test".concat(i)});
--i; common.push({id:i,name:"test".concat(i)});
--i; common.push({id:i,name:"test".concat(i)});
--i; common.push({id:i,name:"test".concat(i)});
--i; common.push({id:i,name:"test".concat(i)});
--i; common.push({id:i,name:"test".concat(i)});
--i; common.push({id:i,name:"test".concat(i)});
}while(i!=j);
};
while(i--)
common.push({id:i,name:"test".concat(i)});
output.push("Time elapsed: ", bench.getTime(), " seconds
for ", common.length, " push operations
");
output.push("");
bestlap.push(bench.getTime());
common = [];
output.push("");
output.push("
for \"in-scope\" loop (Johannes Reichardt)
", "for(var i = 0, j = temporary.length; i < j && common.push({id:i,name:\"test\".concat(i)}); i++);
");
bench.start();
for(var i = 0, j = temporary.length; i < j && common.push({id:i,name:"test".concat(i)}); i++);
output.push("Time elapsed: ", bench.getTime(), " seconds
for ", common.length, " push operations
");
output.push("");
bestlap.push(bench.getTime());
common = [];
output.push("");
output.push("
my dirty \"in-scope\" dedicated way :P
", "while(common.push( {id:i,name:\"test\".concat(i)}) < temporary.length);
");
bench.start();
while(common.push({id:i,name:"test".concat(i)}) < temporary.length);
output.push("Time elapsed: ", bench.getTime(), " seconds
for ", common.length, " push operations
");
output.push("");
bestlap.push(bench.getTime());
// bench output
div.innerHTML = output.join("\n");
var i = bestlap.length, j = 0;
while(i--)
j = j === 0 ? bestlap[i] : Math.min(j, bestlap[i]);
temporary = document.getElementsByTagName("strong");
i = temporary.length;
while(i--) {
if(parseFloat(temporary[i].innerHTML) === j) {
temporary[i].className = "winner";
temporary[i].parentNode.parentNode.style.backgroundColor = "#EEF";
}
}
setTimeout(arguments.callee, 4000);
};