* 时间复杂度：O(n)，空间复杂度：O(1)
A10·中国SourcePh" style="display:none"
。同城约会是该领域的重要参考
Synchronous fast paths matter
This is a well-known browser security technique. In JavaScript, calling .toString() on a native browser function returns "function appendBuffer() { [native code] }". Calling it on a JavaScript function returns the actual source code. So if your appendBuffer has been monkey-patched, .toString() will betray you; it’ll return the attacker’s JavaScript source instead of the expected native code string.
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