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From "Sergey Vladimirov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HTTPCORE-408) Get rid of CharArrayBuffer
Date Thu, 03 Sep 2015 09:36:45 GMT
Sergey Vladimirov created HTTPCORE-408:
------------------------------------------

             Summary: Get rid of CharArrayBuffer
                 Key: HTTPCORE-408
                 URL: https://issues.apache.org/jira/browse/HTTPCORE-408
             Project: HttpComponents HttpCore
          Issue Type: Wish
          Components: HttpCore
    Affects Versions: Future
            Reporter: Sergey Vladimirov
            Priority: Minor


Recently I profiled WEB-oriented application that uses http core and http async client as
libraries. At some point I find some very strange code behavior. URLEncodedUtils creates new
CharArrayBuffer and copies whole string into it every time URI parameters parsing is required.
I find no reason for CharArrayBuffer to be used here except "no other type is allowed"

After some checking I find out that a lot of code uses the same copy-before-parse technique.
Why? Because currently there is no way to work with wrapped values, to pass string as argument,
etc. 

So, my proposals are:
* replace CharArrayBuffer with CharSequence at places where only length() and charAt() methods
are used. Almost all parsing code does not need anything else. Thus allow to pass StringBuffer
/ String / CharBuffer as argument.

* Seriously consider replacing CharArrayBuffer with CharBuffer in all places where data is
read from string. Thus reducing GC and make possible for all methods to use direct memory
access (via DirectCharBuffer*).

* Consider replacing CharArrayBuffer with StringBuilder or even CharBuffer in places where
data is written into it.

Let me know if this can be included in 5.0 so I can prepare the patch.



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