Bugzilla bug 231849: added performance optimizations (same as those we use for Unix).  r=wtc.
Bugzilla bug 231849: added performance optimizations (same as those we use
for Unix).  r=wtc.

makotokato/nsprpub,makotokato/nsprpub,makotokato/nsprpub,makotokato/nsprpub,makotokato/nsprpub