Thanks. I had a feeling that python's GIL (global interpreter lock)
would be a limiting factor. I worked around my performance issue by
doing some smarting caching to avoid some of the more intensive
operations. But for the sake of argument, suppose I couldn't rework my
algorithms. From what I can gather, is the common consensus that I need
to spin off new processes?
Jason H wrote:
This sounds like the GIL.
Separate the validation to another process, not another thread. Use
non-blocking io (Qt's default) do get yoru GUI responsive again.
----- Original Message ----
From: Brent Villalobos <[email protected]>
To: "[email protected]" <[email protected]>
Sent: Monday, July 20, 2009 7:35:56 PM
Subject: [PyQt] GUI freezing when running large function in QThread
I'm trying to write a "validation" thread that will run persistently throughout my PyQt
program and validate that user has entered the correct values in the fields. The validation thread
calls a function in a separate python module that shouldn't know anything about PyQt since it is a
general-purpose module that runs in both gui and non-gui applications. The problem is that my GUI
slows way down where actions like mouse clicks aren't recognized until the validation function
finishes. The validation function is doing some mild CPU and I/O work, but nothing that peaks out
the processor or disk. Unfortunately I don't have a simple case to show at this time, but perhaps
people have run into a similar issue in past. Anyone have any suggestions how I can make a
function that runs in a QThread more "gui-friendly" without adding any Qt-specific calls
to it? Thanks.
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