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https://issues.apache.org/jira/browse/LANG-604?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Henri Yandell updated LANG-604:
-------------------------------
Fix Version/s: 3.1
Assigning to 3.1. It needs a little work to fix out, but the issue is largely
defined. Not needed for 3.0 release.
> Optimize isBlank() for untrimmed strings
> ----------------------------------------
>
> Key: LANG-604
> URL: https://issues.apache.org/jira/browse/LANG-604
> Project: Commons Lang
> Issue Type: Improvement
> Components: lang.*
> Affects Versions: 3.0
> Reporter: Kai Gülzau
> Priority: Minor
> Fix For: 3.1
>
>
> Change isBlank() to start iteration in the middle of the String.
> So you get better performance for untrimmed Strings like " dummy ".
> Here is my proposal:
> public static boolean isBlank(CharSequence cs) {
> int strLen;
> if (cs == null || (strLen = cs.length()) == 0) {
> return true;
> }
> int mid = strLen / 2, i = mid;
> for (; i < strLen; i++) {
> if (!Character.isWhitespace(cs.charAt(i))) {
> return false;
> }
> }
> for (i = 0; i < mid; i++) {
> if (!Character.isWhitespace(cs.charAt(i))) {
> return false;
> }
> }
> return true;
> }
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