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From: | Rik |
Subject: | [Octave-bug-tracker] [bug #52809] interpreter performance is slow on development branch |
Date: | Thu, 4 Jan 2018 13:31:02 -0500 (EST) |
User-agent: | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:55.0) Gecko/20100101 Firefox/55.0 |
URL: <http://savannah.gnu.org/bugs/?52809> Summary: interpreter performance is slow on development branch Project: GNU Octave Submitted by: rik5 Submitted on: Thu 04 Jan 2018 10:31:00 AM PST Category: Performance Severity: 3 - Normal Priority: 5 - Normal Item Group: Regression Status: Confirmed Assigned to: None Originator Name: Originator Email: Open/Closed: Open Discussion Lock: Any Release: dev Operating System: Any _______________________________________________________ Details: The evaluation of statements seems to be much slower on the development branch than in previous versions. A sample script testing just a for loop is: tic; for i=1:1000; for j=1:1000; end; end; toc On my machine, results are roughly equivalent between 4.2.1 and the development branch. 4.2.1 : 0.109 seconds dev. : 0.121 seconds But if there is even a single variable assignment the results are far worse. tic; for i=1:1000; for j=1:1000; a = 1.0; end; end; toc Results: 4.2.1 : 0.218 seconds dev. : 1.28 seconds Benchmarking scripts are attached. _______________________________________________________ File Attachments: ------------------------------------------------------- Date: Thu 04 Jan 2018 10:31:00 AM PST Name: bm_for_loop4.m Size: 47B By: rik5 <http://savannah.gnu.org/bugs/download.php?file_id=42831> ------------------------------------------------------- Date: Thu 04 Jan 2018 10:31:00 AM PST Name: bm_for_loop5.m Size: 56B By: rik5 <http://savannah.gnu.org/bugs/download.php?file_id=42832> _______________________________________________________ Reply to this item at: <http://savannah.gnu.org/bugs/?52809> _______________________________________________ Message sent via/by Savannah http://savannah.gnu.org/
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