How can i change the colour of key words in long text fast ?

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hi,

 

i have long text (for example script) should displayed in textarea (or similar) colored keywords.

 

tried textrange

 

new textrange (mytextarea, true, start_index, stop_index)

 

and with

 

richeditabletext 

 

var highlightformat:textlayoutformat = new textlayoutformat();

 

highlightformat.color = 0xff0000;

 

for each (var currentkeyword:string in keywords) {

....

myricheditabletext.setformatofrange(highlightformat, indexofkeyword, indexofkeyword + currentkeyword.length);

 

either ways slow, 30 sec....

 

the indexes of words should colored computed below second creating object every keyword expensive .

 

any idea should ?



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