On Thu, 2024-05-02 at 02:13 -0700, Kwankyu Lee wrote:
> Moreover, this case seems to spur the need to introduce timing tests to
> watch out regressions in code performance without a failure.
>
Shameless plug:
https://github.com/sagemath/sage/pull/36226
I see these regressions (old
Moreover, this case seems to spur the need to introduce timing tests to
watch out regressions in code performance without a failure.
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On Thursday, May 2, 2024 at 8:54:58 AM UTC+9 Nils Bruin wrote:
... I'd expect that performance can be significantly improved by optimizing
the sage code.
Exactly. It is related with
sage: time bool(x == 0.1)
CPU times: user 1.47 s, sys: 133 ms, total: 1.6 s
Wall time: 1.14 s
False
Fixed
On Wednesday 1 May 2024 at 16:45:36 UTC-7 Kwankyu Lee wrote:
I wonder if they, maintainers of maxima, would regard this as a bug...
I'm pretty sure the piecewise functions are NOT borrowed from maxima. It
probably gets called because there are some inequalities concerning the
symbolic ring.
On Thursday, May 2, 2024 at 12:37:44 AM UTC+9 Nils Bruin wrote:
Working on *why* it might be so slow a bit:
%prun for i in range(100r): f(0.1)
798103 function calls (791903 primitive calls) in 1.327 seconds
Impressive. Thanks.
so, most stuff is happening in maxima and in _subs_,
Working on *why* it might be so slow a bit:
%prun for i in range(100r): f(0.1)
798103 function calls (791903 primitive calls) in 1.327 seconds
Ordered by: internal time
ncalls tottime percall cumtime percall filename:lineno(function)
80000.5560.0000.628
For another data point, on an ubuntu laptop:
sage: time [f(0.1*i) for i in range(1,10)]
CPU times: user 136 ms, sys: 0 ns, total: 136 ms
Wall time: 99.1 ms
[1, 1, 1, 1, 1, 1, 1, 1, 1]
sage: time f(0.1)
CPU times: user 13.6 ms, sys: 0 ns, total: 13.6 ms
Wall time: 13.5 ms
1
sage: version()
Hi,
I get
sage: f = piecewise([((0,1),1)])
sage: time f(0.1)
CPU times: user 135 ms, sys: 4.23 ms, total: 140 ms
Wall time: 146 ms
1
sage: time f(0.2)
CPU times: user 133 ms, sys: 3.56 ms, total: 136 ms
Wall time: 137 ms
1
This is painfully slow. Is this normal?
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