On Dec 4, 2008, at 2:11 AM, Michael Watkins wrote:
I've not had time to see what changed in Python 2.6 to produce
better QPY
template performance:
m...@frog$ python2.5 bigtable.py
ElementTree 736.43 ms
cStringIO 36.46 ms
StringIO 141.10 ms
list concat 22.73 ms
QPY Template 129.35 ms
m...@frog$ python2.6 bigtable.py
ElementTree 656.99 ms
cStringIO 30.85 ms
StringIO 131.95 ms
list concat 16.37 ms
QPY Template 39.54 ms
Interesting... running the 3 benchmarks included with evoque also
confirms a big increase in 2.6, even if maybe not as dramatic as what
you observe.
In these 3 benchmarks, the "mq" means "manual quoting" -- and for this
one qpy is not used at all (uses cgi.escape to do the quoting). In all
cases, the bulk of evoque's work is achieved via eval(). The "nqt"
means "no quoting tweaked", probably similar to your "list concat".
For more details on each of these benchmark, see:
http://evoque.gizmojo.org/benchmark/
Interesting to note is that the gains seems to be consistent across
the board (qpy gains are always the highest though).
Also, for the subs bench (only string substitutions) we can also
compare to pystr_nq (python template.String) -- that does less than
the others as it does "no quoting". Surprisingly, it seems to get
slower in 2.6...
$ python2.5 bench/bigtable.py qpy evoque evoque_mq
qpy: 55.85 ms
evoque: 99.27 ms
evoque_mq: 86.29 ms
evoque_nqt: 9.13 ms
$ python2.6 bench/bigtable.py qpy evoque evoque_mq
qpy: 30.82 ms
evoque: 57.57 ms
evoque_mq: 57.13 ms
evoque_nqt: 8.18 ms
$ python2.5 bench/basic.py qpy evoque evoque_mq
qpy: 0.20 ms
evoque: 0.48 ms
evoque_mq: 0.42 ms
$ python2.6 bench/basic.py qpy evoque evoque_mq
qpy: 0.10 ms
evoque: 0.35 ms
evoque_mq: 0.32 ms
$ python2.5 bench/subs.py pystr_nq qpy evoque evoque_mq
pystr_nq: 0.05 ms
qpy: 0.05 ms
evoque: 0.05 ms
evoque_mq: 0.05 ms
$ python2.6 bench/subs.py pystr_nq qpy evoque evoque_mq
pystr_nq: 0.06 ms
qpy: 0.03 ms
evoque: 0.04 ms
evoque_mq: 0.04 ms
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