tree 303daae3dfcb80a883facdae7d593e3e099779c3
parent 1f1d0a57fad17fb0fb1e1a44b1a38be17ea9976e
author Raymond Hettinger <python@rcn.com> 1375004389 -0700
committer Raymond Hettinger <python@rcn.com> 1375004389 -0700
HG:rename-source hg

Restore the data block size to 62.

The former block size traded away good fit within cache lines in
order to gain faster division in deque_item().  However, compilers
are getting smarter and can now replace the slow division operation
with a fast integer multiply and right shift.  Accordingly, it makes
sense to go back to a size that lets blocks neatly fill entire
cache-lines.

GCC-4.8 and CLANG 4.0 both compute "x // 62" with something
roughly equivalent to "x * 9520900167075897609 >> 69".