[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Octave-bug-tracker] [bug #54422] Declining Octave performance over time
From: |
Rik |
Subject: |
[Octave-bug-tracker] [bug #54422] Declining Octave performance over time |
Date: |
Wed, 1 Aug 2018 17:01:34 -0400 (EDT) |
User-agent: |
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:61.0) Gecko/20100101 Firefox/61.0 |
URL:
<http://savannah.gnu.org/bugs/?54422>
Summary: Declining Octave performance over time
Project: GNU Octave
Submitted by: rik5
Submitted on: Wed 01 Aug 2018 02:01:32 PM PDT
Category: Interpreter
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Performance
Status: None
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: dev
Operating System: GNU/Linux
_______________________________________________________
Details:
I happened to be looking at an old bug which had examples of three for loops.
I have attached the script as bm_accum.m. When I run the script in an old
release (3.4.3) of Octave I get
octave-3.4.3:1> bm_accum
Elapsed time is 0.353004 seconds.
Elapsed time is 0.172448 seconds.
Elapsed time is 0.15855 seconds.
When I run it with the current development branch I get
Elapsed time is 1.54277 seconds.
Elapsed time is 0.675958 seconds.
Elapsed time is 1.24968 seconds.
There are slowdowns of from 4X-7.5X.
To make sure this wasn't a measurement artifiact within Octave I tried using
the tcsh shell's time command.
time run-octave -f bm_accum.m
Elapsed time is 1.53665 seconds.
Elapsed time is 0.683419 seconds.
Elapsed time is 1.28853 seconds.
3.704u 0.072s 0:03.87 97.4% 0+0k 160+16io 2pf+0w
and
time octave-3.4.3 -fq bm_accum.m
Elapsed time is 0.332402 seconds.
Elapsed time is 0.154823 seconds.
Elapsed time is 0.154164 seconds.
0.684u 0.024s 0:00.71 98.5% 0+0k 0+16io 0pf+0w
Again, a significant 5.5X difference.
_______________________________________________________
Reply to this item at:
<http://savannah.gnu.org/bugs/?54422>
_______________________________________________
Message sent via Savannah
https://savannah.gnu.org/
- [Octave-bug-tracker] [bug #54422] Declining Octave performance over time,
Rik <=