[Bug classpath/32541] New: Buffering in OutputStreamWriter speeds up dacapo xalan

[robin dot garner at anu dot edu dot au]

On JikesRVM (and possibly other VMs), dacapo xalan performs lots of small IO
using the default character encoding.  OutputStreamWriter currently buffers
characters when converting between character sets, but bypasses this when not
converting.  Applying the buffering uniformly speeds up dacapo xalan by 2x on
JikesRVM.

ALso, for single character IO, a new char array is allocated per IO operation. 
Avoiding this allocation gives a ~5% speedup.


-- 
           Summary: Buffering in OutputStreamWriter speeds up dacapo xalan
           Product: classpath
           Version: 0.95
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: classpath
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: robin dot garner at anu dot edu dot au
  GCC host triplet: all


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32541