dist/yodata-context.js
function hashString(string) {
	    // This is the hash from JVM
	    // The hash code for a string is computed as
	    // s[0] * 31 ^ (n - 1) + s[1] * 31 ^ (n - 2) + ... + s[n - 1],
	    // where s[i] is the ith character of the string and n is the length of
	    // the string. We "mod" the result to make it between 0 (inclusive) and 2^31
	    // (exclusive) by dropping high bits.
	    var hash = 0;
	    for (var ii = 0; ii < string.length; ii++) {
	      hash = 31 * hash + string.charCodeAt(ii) | 0;
	    }
	    return smi(hash);
	  }
function hashString(string) {
	    // This is the hash from JVM
	    // The hash code for a string is computed as
	    // s[0] * 31 ^ (n - 1) + s[1] * 31 ^ (n - 2) + ... + s[n - 1],
	    // where s[i] is the ith character of the string and n is the length of
	    // the string. We "mod" the result to make it between 0 (inclusive) and 2^31
	    // (exclusive) by dropping high bits.
	    var hash = 0;
	    for (var ii = 0; ii < string.length; ii++) {
	      hash = 31 * hash + string.charCodeAt(ii) | 0;
	    }
	    return smi(hash);
	  }
http://jsperf.com/hashing-strings