[pypy-dev] pypy1.6 slow on string-heavy ops

[Jacob Biesinger]

A better breakdown...

fasta_file = sys.argv[1]  # should be *.fa
> print 'loading dna from', fasta_file
> chroms = {}
> dna = None
> for l in open(fasta_file):
>     if l.startswith('>'):  # new chromosome
>         if dna is not None:
>             chroms[chrom] = dna
>         chrom = l.strip().replace('>', '')
>          dna = ''
>     else:
>         dna += l.rstrip()
> if dna is not None:
>     chroms[chrom] = dna
>

CPython takes about 1.5 seconds to get to this point in the code, while pypy
hasn't passed this point in 30 minutes.
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