#17013: WordDatatype_char
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Reporter: | Owner:
vdelecroix | Status: needs_review
Type: | Milestone: sage-6.4
enhancement | Resolution:
Priority: major | Merged in:
Component: | Reviewers: Sébastien Labbé
combinatorics | Work issues:
Keywords: words | Commit:
Authors: | a563343267f1690d74275ad3835cdebef8512a19
Vincent Delecroix | Stopgaps:
Report Upstream: N/A |
Branch: |
u/slabbe/17013 |
Dependencies: |
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Comment (by vdelecroix):
Replying to [comment:4 slabbe]:
> We should also add here some benchmark about equality test and also
`__getitem__`.
Competitions between:
- Python string
- `FiniteWord_str`
- `FiniteWord_char`
{{{
sage: W1 = Words('abc')
sage: W2 = Words([0,1,2])
sage: w1 = W1([choice('abc') for _ in range(1000)])
sage: w2 = W2([choice([0,1,2]) for _ in range(1000])
sage: s = str(w1)
}}}
then on slices
{{{
sage: timeit("for i in range(1000): u = w1[:i]")
5 loops, best of 3: 28.8 ms per loop
sage: timeit("for i in range(1000): u = w2[:i]")
625 loops, best of 3: 237 µs per loop
sage: timeit("for i in range(1000): u = s[:i]")
625 loops, best of 3: 129 µs per loop
}}}
and on equality
{{{
sage: timeit("w1 == w1")
625 loops, best of 3: 9.88 µs per loop
sage: timeit("w2 == w2")
625 loops, best of 3: 187 ns per loop
sage: timeit("s == s")
625 loops, best of 3: 86.6 ns per loop
}}}
So Python strings are still ahead, but its much less ridiculous.
Vincent
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Ticket URL: <http://trac.sagemath.org/ticket/17013#comment:5>
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