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Commit39dae7f

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Deprecated: optimize regular expression for $.trim for long sequences of whitespace runs
Regex imp implementation takes O(N^2) time to trim the string when multipleadjacent spaces were present.The new expression require that the "whitespace run" starts from a non-whitespaceto avoid O(N^2) behavior when the engine would try matching "\s$" at each space position.
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‎src/deprecated.js

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@@ -15,7 +15,9 @@ define( [
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// Support: Android <=4.0 only
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// Make sure we trim BOM and NBSP
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varrtrim=/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g;
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// Require that the "whitespace run" starts from a non-whitespace
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// to avoid O(N^2) behavior when the engine would try matching "\s$" at each space position.
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varrtrim=/^[\s\uFEFF\xA0]+|([^\s\uFEFF\xA0])[\s\uFEFF\xA0]+$/g;
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// Bind a function to a context, optionally partially applying any
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// arguments.
@@ -82,6 +84,6 @@ jQuery.isNumeric = function( obj ) {
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jQuery.trim=function(text){
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returntext==null ?
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"" :
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(text+"").replace(rtrim,"");
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(text+"").replace(rtrim,"$1");
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};
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});

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