Created
May 4, 2012 10:56
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setIntervalOptimizer.js
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// http://d.hatena.ne.jp/amachang/20060924/1159084608 | |
// ここのやつがリンク切れしてたのでarchiveからもってきた | |
var _si_nativeSetInterval = setInterval; | |
var _si_nativeClearInterval = clearInterval; | |
var _si_intervalTime = 10; | |
var _si_counter = 1; | |
var _si_length = 0; | |
var _si_functions = {}; | |
var _si_counters = {}; | |
var _si_numbers = {}; | |
var _si_intervalId = undefined; | |
var _si_loop = function() { | |
var f = _si_functions, c = _si_counters, n = _si_numbers; | |
for(var i in f) { | |
if(!--c[i]) { | |
f[i](); | |
c[i] = n[i]; | |
} | |
} | |
}; | |
setInterval = function(handler, time) { | |
if(typeof handler == 'string') | |
handler = new Function(handler); | |
_si_functions[_si_counter] = handler; | |
_si_counters[_si_counter] = _si_numbers[_si_counter] = Math.ceil(time / _si_intervalTime); | |
if (++_si_length && !_si_intervalId) { | |
_si_intervalId = _si_nativeSetInterval(_si_loop, _si_intervalTime); | |
} | |
return _si_counter++; | |
}; | |
clearInterval = function(id) { | |
if(_si_functions[id]) { | |
delete _si_functions[id]; | |
delete _si_numbers[id]; | |
delete _si_counters[id]; | |
if (!--_si_length && _si_intervalId) { | |
_si_nativeClearInterval(_si_intervalId); | |
_si_intervalId = undefined; | |
} | |
} | |
}; |
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