Review Request for CR : 7050528 Improve performance of java.text.DecimalFormat.format() call stack

Olivier Lagneau olivier.lagneau at
Tue Sep 13 14:11:40 UTC 2011

Please review The implementation of a fast-path algorithm for optimizing the
DecimalFormat(double, ...) call stack.

The webrev is here :

As described in the CR evaluation and suggested fix,
the speed-up on a micro-benchmark is ~x11 on Sparc-USIV arch and ~x10 on 
The footprint cost is ~6kbytes of static char array constant data to 
collect digits from integer values.

New test dedicated at checking fast-path algorithm, as well as 
are coming soon in a subsequent webrev containing them.

Olivier Lagneau, olivier.lagneau at
Oracle, 180 Av. de l'Europe,
ZIRST de Montbonnot, 38334 Saint Ismier, FRANCE
Phone : +33 4 76 18 80 09 Fax : +33 4 76 18 80 23

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