Hi

The speed optimization we discussed. I haven't removed anything, just added some precalculation after Line 107 and a get_scores2(), because we just want to compare the speeds of this and get_scores().

I added a new testfile speed-test-wordpress.py which has output like this:

samplenum: 1000 | verbose: False | epsilon: 1e-05
get_scores time sum :  1.2493748664855957 s | get_scores2 time sum :  0.7079489231109619 s | errors sum :  0

TODOs:

• The optimization is only for BM25Okapi now, the other algorithms are not changed.
• This is still without numpy, but it should be easy to add it, see lines 117 and 145