https://bugs.freedesktop.org/show_bug.cgi?id=87101
Bug ID: 87101
Summary: EDITING 100x performance regression inserting
rows/columns into sheet
Product: LibreOffice
Version: 4.3.4.1 release
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: UNCONFIRMED
Severity: major
Priority: medium
Component: Spreadsheet
Assignee: libreoffice-bugs@lists.freedesktop.org
Reporter: r...@alum.mit.edu
Reference
https://drive.google.com/file/d/0B-4rl96vSQGGenhwd0wzdFpOMFk/view?usp=sharing
Inserting rows into the attached spreadsheet suffers a critical performance
regression going from 4.2.7 to 4.3.4. To reproduce:
1) Go to sheet "T Rank"
2) Select rows 420-519
3) Insert Rows Above (note that 4.2.7 and 4.3.4 are subject to bug 77592).
On my laptop (Core i7-920XM, 16 GB RAM), I measured the following CPU times
(and memory consumption) for opening the file and inserting rows as stated.
Wall clock time is subjectively very close to CPU time and the system shows one
core is 100% occupied. Very little else was taking place, so hyperthreading or
turbo mode is unlikely to be responsible for any significant difference. The
VSZ and RSS columns are the memory consumption following the load and insert
operations; the VSZ (close) column is the virtual size after closing the
spreadsheet.
Inserting columns shows similar behavior, but I didn't measure it. I'm less
certain about removing sheets, but that also seems much slower in 4.3.4.
This is in all cases using the freedesktop RPM's, not the distro RPMs (for
openSUSE 13.2).
4.2.7 is a nice improvement over 4.1.5. 4.3.4 is unusable.
Version Load Insert Rows VSZ RSS VSZ (close)
4.1.5 1:33 0:33 9659796 8200896 11195680
4.2.7 2:00 0:14 2158056 681396 2147184
4.3.4 2:07 23:15 2818208 1317840 3962356
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