#10295: Upgrading pexpect
-------------------------------------+-------------------------------------
Reporter: SimonKing | Owner: was
Type: enhancement | Status: new
Priority: major | Milestone: sage-6.7
Component: interfaces | Resolution:
Keywords: pexpect upgrade | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/fbissey/pexpect3.3 | a24eab3ce985874ab8445ed5e362bbeead76fd40
Dependencies: | Stopgaps:
-------------------------------------+-------------------------------------
Comment (by fbissey):
pexpect-2.0
{{{
┌────────────────────────────────────────────────────────────────────┐
│ SageMath Version 6.7.beta4, Release Date: 2015-05-05 │
│ Type "notebook()" for the browser-based notebook interface. │
│ Type "help()" for help. │
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┃ Warning: this is a prerelease version, and it may be unstable. ┃
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sage: %timeit gp.eval('2+3')
The slowest run took 269.56 times longer than the fastest. This could mean
that an intermediate result is being cached
10000 loops, best of 3: 94.4 us per loop
sage: %timeit gp('2') + gp('3')
The slowest run took 8.78 times longer than the fastest. This could mean
that an intermediate result is being cached
1000 loops, best of 3: 556 us per loop
sage: %timeit s=str(gp.eval('2^10000'))
1000 loops, best of 3: 250 us per loop
}}}
One time only so we don't use the cache
{{{
sage: %time gp.eval('2+3')
CPU times: user 0 ns, sys: 0 ns, total: 0 ns
Wall time: 728 us
'5'
sage: %time gp('2') + gp('3')
CPU times: user 0 ns, sys: 0 ns, total: 0 ns
Wall time: 1.51 ms
5
sage: %time s=str(gp.eval('2^10000'))
CPU times: user 0 ns, sys: 0 ns, total: 0 ns
Wall time: 667 us
}}}
pexpect-3.3
{{{
sage: %timeit gp.eval('2+3')
The slowest run took 80.90 times longer than the fastest. This could mean
that an intermediate result is being cached
1000 loops, best of 3: 309 us per loop
sage: %timeit gp('2') + gp('3')
1000 loops, best of 3: 1.54 ms per loop
sage: %timeit s=str(gp.eval('2^10000'))
The slowest run took 6.02 times longer than the fastest. This could mean
that an intermediate result is being cached
1000 loops, best of 3: 513 us per loop
}}}
One time only
{{{
sage: %time gp.eval('2+3')
CPU times: user 10 ms, sys: 0 ns, total: 10 ms
Wall time: 30.5 ms
'5'
sage: %time gp('2') + gp('3')
CPU times: user 0 ns, sys: 0 ns, total: 0 ns
Wall time: 4.58 ms
5
sage: %time s=str(gp.eval('2^10000'))
CPU times: user 0 ns, sys: 0 ns, total: 0 ns
Wall time: 644 us
}}}
So it is a little bit all over the place, but generally 3 to 4 times
slower with pexpect 3.3. I don't know if it is acceptable. Since upstream
is now alive and well we could take it as an issue with them?
--
Ticket URL: <http://trac.sagemath.org/ticket/10295#comment:32>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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