The problem. The PHP implementation is a lot slower.
Embarrassingly slower. Without any caching the Java version is able
to do ~6000 queries per second. The PHP counterpart can push
through ~850 queries. The implementations are the same. The stats
provided by the author of the library are 8000 vs 1200. So about
the same as my measurements.
Via reddit.com,
Case
study: Is PHP embarrasingly slower than Java?
In my ever continuing obsession
with stupid benchmarks and optimization, I decided to tackle this particular
little problem like I did with Jumble—map everything into memory and avoid disk
I/O altogether (well, explicit disk
I/O—the system will page in the
data implicitly as it's used). This time, the data maps down to an
object file about 8½ megabytes in size (all constant data, so pages
can be discarded, not paged out), and with that, I was able to get ~100,000
queries per second.
On a 120MHz machine!
It didn't even take all that long to write …
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