https://bugs.kde.org/show_bug.cgi?id=418778
Bug ID: 418778
Summary: Very slow VHDL syntax highlighting
Product: frameworks-syntax-highlighting
Version: 5.66.0
Platform: Manjaro
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: syntax
Assignee: kwrite-bugs-n...@kde.org
Reporter: g...@babylon2k.de
Target Milestone: ---
Created attachment 126746
--> https://bugs.kde.org/attachment.cgi?id=126746&action=edit
Flamegraph for highlighting /lib/gaisler/leon3v3/iu3.vhd
SUMMARY
The syntax highlighting for VHDL files takes very long to complete.
STEPS TO REPRODUCE
1. Download and extract
https://www.gaisler.com/products/grlib/grlib-gpl-2019.4-b4246.tar.gz (from
https://www.gaisler.com/index.php/downloads/leongrlib)
2. Use kate to open ./lib/gaisler/leon3v3/iu3.vhd from the extracted archive
3. Hit CTRL+END to scroll to the end of the file
OBSERVED RESULT
It takes _very_ long until the end of the file is actually reached.
On my machine this is ~30secs (CPU is an Intel(R) Core(TM) i7-7700K CPU @
4.20GHz)
Note that the file itself is only 190KB large.
EXPECTED RESULT
Much faster syntax highlighting.
SOFTWARE/OS VERSIONS
Linux: Manjaro
KDE Plasma Version: 5.17.5
KDE Frameworks Version: 5.66.0
Qt Version: 5.14.1 (built against 5.14.0)
ADDITIONAL INFORMATION
Attached is a flamegraph showing that most of the time is spent in libpcre2
(process has been terminated after scrolling to end of file has finished).
Hence I assume this is related to using regular expressions extensively in the
syntax highlighting file.
--
You are receiving this mail because:
You are watching all bug changes.
