Hi, Op 2010-11-16 18:14, Lee Jenkins het geskryf: > applications, but against my judgment I figured I'd give lazarus > another go for a GUI app which was a mistake apparently.
Following up from Lee's post, but related to StringGrids. I too tried to used LCL again, for a External Tracing/Debugging tool. My plans was to make an executable for fpGUI and LCL. The latter giving users the native look and feel and all that... I use StringGrid components a lot in my fpGUI apps, so that was my first choice for the display component, but for some reason I couldn't use it under the LCL version of my tool. What does my app do. It works something like the "debug server" included with Lazarus, but a lot more detailed with what it displays and how the developer can manipulate the traced data. Log information comes in hard and fast, and unlimited in volume - depending on what you are debugging of course, and the amount of traces/logs you setup. I then did a simple test to see what could be the cause of problems in the LCL app (and why it looks frozen). I created a stringgrid with exact dimensions, a single column. I then used a simple test method that generates log entries (8 million to be exact - did start small though). Each time a log is received, I do a BeginUpdate, add a new row to the grid, populate the first cell with a number, then call EndUpdate. Under fpGUI this test took 5 seconds to complete, MSEgui took 10 seconds (just for fun, I tied MSEgui too). LCL took.... well, I kill the app after 3 hours of 100% CPU load and still nothing being displayed. Thank goodness I have a quad core, so the 100% load on one core did not affect my day-to-day work. Anybody know about the performance problems in TStringGrid? Anybody tracked down what exactly is causing its bad performance? I can only assume the problem is known, and the reason why Lazarus IDE itself uses a TreeView instead of a StringGrid for the Messages window. Should I report this in Mantis? Regards, - Graeme - -- fpGUI Toolkit - a cross-platform GUI toolkit using Free Pascal http://opensoft.homeip.net:8080/fpgui/ -- _______________________________________________ Lazarus mailing list [email protected] http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
