[x64] Low compare speed in Synchronize Dirs

[xdimka]

Menu/Synchronize Dirs

dramaticaly decreasing speed in comparing process between two folders over ver. 7.56a

OS: Windows7 Ultimate x64

[Sob]

Is it maybe the same as Comparing files in Synchronize Dirs is terribly slow?

[xdimka]

Im using default scheme and its not flickering, only comparing process is slow

[ghisler(Author)]

It's indeed the same problem. You just don't see any flickering because the Windows aero theme seems to double buffer the drawing to the display.

[ghisler(Author)]

Fixed according to the above thread!

[Balderstrom]

Is this fixed?

I notice before there is even any chance for there to be window drawing updates, during the reading directories phase::

With: 13,106 Directories & 415,165 files.
TC 7.56a Time: ~50s to read

TC 8.0b2 (x64) Times

• 30s, 3400 dirs
• 60s, 3800 dirs
• 90s, 4300 dirs
• 150s, 9813 dirs
• 180s, 10809 dirs
• 250s, 13106 dirs

TC 8.0b2 took 5 times as long to read the same drive as 7.56a, and if anything some of the data could of been cached (TC 8 went second).

[Samuel]

2Balderstrom
What about TC 8.0b2 (x32)

2ghisler(Author)
Do you update the GUI after each new directory / file?
Wouldn't this be a perfect position for the new way of updating the GUI you introduced for the copy dialogs? (update the GUI after 100 or 200 ms)

This would be also a possible improvement in the "compare by content" phase of the synchronization. (with many small files)

[Sob]

In other thread I wrote it's fixed, but it's not completely true. I don't know why I missed 32-bit version. I tested again all versions and for me the results are:

TC8b1-32, TC8b2-32, TC8b1-64: horribly slow, flickering list and maxing out one CPU core all the time

TC 7.56a, TC8b2-64: fast, non-flickering list, CPU usage is high only when data are already cached in memory, otherwise HDD is the bottleneck

Directory reading phase (before actually comparing the files) is roughly the same with all.

[ghisler(Author)]

The bug report was about x64 only, so I didn't change the 32-bit code - it should be the same as in TC 7.56a. I will check whether anything was changed in the 32-bit code which may make it flickering.

Do you update the GUI after each new directory / file?

I'm just invalidating the affected lines, but it seems that I'm getting redraw events for the entire list. Beta 2 x64 now uses a function to check which part of the list really needs to be refreshed (GetClipBox).