[Bug 30224] New: Piping wine in a shell makes it run slower.
wine-bugs at winehq.org
wine-bugs at winehq.org
Mon Mar 19 13:42:57 CDT 2012
http://bugs.winehq.org/show_bug.cgi?id=30224
Bug #: 30224
Summary: Piping wine in a shell makes it run slower.
Product: Wine
Version: 1.4
Platform: x86
OS/Version: Linux
Status: UNCONFIRMED
Severity: minor
Priority: P2
Component: -unknown
AssignedTo: wine-bugs at winehq.org
ReportedBy: qparis at playonlinux.com
Classification: Unclassified
Sometimes, it can be useful to run wine through pipes to catch debug logfiles.
For exemple, we might want to run something like wine 2>&1 | tee -a logfile.log
to get stdout and stderr into a logfile
The problem is that if wine is run like this, it takes 4 seconds to exit. The
problems does not appear to be important, but sometimes (bash scripts, POL,
winetricks for example), we need to run wine several times and we want to log
everything. This problem really slows down the process.
The problem is really simple to reproduce : in a clean wineprefix, run the two
following commands:
time wine wineconsole 2>&1 | cat
# real 0m4.912s
time wine wineconsole 2>&1 | grep Usage
# real 0m4.006s
time wine wineconsole 2>&1
# real 0m0.865s
For the first commands (the slow ones), we can see that wineconsole takes time
to exit without knowing why.
This problem does not appear if stdin and stdout are separated:
time wine wineconsole | cat
# real 0m0.836s
time wine wineconsole > >(cat) 2> >(cat)
# real 0m0.774s
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