Too slow while comparing folder/text file

[slessard]

I find window scrolling to be painfully slow (especially in text comparison windows.) I've been using Beyond Compare on the Mac since it came out (and on Windows for years before that) and only recently came to feel that scrolling is no longer a zippy as it used to be.

[slessard]

and inline editing of text files is not excruciatingly slow. I'm running BC4 Version 4.2.4 (build 22795) on macOS Sierra 10.12.6 (16G1314)

[Aaron]

Thanks for the report. We have had a couple in this thread, but haven't narrowed down the exact causes yet. What hardware configuration are you running? What resolution are you running at; if you decrease it do you see a performance increase?

[slessard]

I've tried disconnecting all external monitors and resetting the built-in retina display to its default resolution. After doing that I also tried quitting a restarting BC4. Nothing helped.

To answer your questions:
* MacBook Pro (Retina, 15-inch, Early 2013)
* 2.4 GHz Intel Core i7
* 16 GB 1600 MHz DDR3
* macOS Sierra Version 10.12.6 (16G1314)
* Darwin C02KQ12UFFT3.local 16.7.0 Darwin Kernel Version 16.7.0: Tue Jan 30 11:27:06 PST 2018; root:xnu-3789.73.11~1/RELEASE_X86_64 x86_64
* Intel HD Graphics 4000:
** Chipset Model: Intel HD Graphics 4000
** Type: GPU
** Bus: Built-In
** VRAM (Dynamic, Max): 1536 MB
** Vendor: Intel (0x8086)
** Device ID: 0x0166
** Revision ID: 0x0009
** Automatic Graphics Switching: Supported
** gMux Version: 3.2.19 [3.2.8]
** Metal: Supported
* NVIDIA GeForce GT 650M:
** Chipset Model: NVIDIA GeForce GT 650M
** Type: GPU
** Bus: PCIe
** PCIe Lane Width: x8
** VRAM (Total): 1024 MB
** Vendor: NVIDIA (0x10de)
** Device ID: 0x0fd5
** Revision ID: 0x00a2
** ROM Revision: 3688
** Automatic Graphics Switching: Supported
** gMux Version: 3.2.19 [3.2.8]
** Metal: Supported
** Displays:
*** Color LCD:
**** Display Type: Built-In Retina LCD
**** Resolution: 2880 x 1800 Retina
**** Pixel Depth: 32-Bit Color (ARGB8888)
**** Main Display: Yes
**** Mirror: Off
**** Online: Yes
**** Rotation: Supported
**** Automatically Adjust Brightness: No
**** Connection Type: DisplayPort
*** ASUS PB287Q:
**** Resolution: 2560 x 1440 @ 59 Hz
**** Pixel Depth: 32-Bit Color (ARGB8888)
**** Mirror: Off
**** Online: Yes
**** Rotation: Supported
**** Automatically Adjust Brightness: No
**** Connection Type: DisplayPort
*** ASUS PB278:
**** Resolution: 2560 x 1440 @ 59 Hz
**** Pixel Depth: 32-Bit Color (ARGB8888)
**** Display Serial Number: F5LMTF050160
**** Mirror: Off
**** Online: Yes
**** Rotation: Supported
**** Automatically Adjust Brightness: No
**** Connection Type: DisplayPort

[Aaron]

First, back up your settings using the Tools menu -> Export wizard and export everything as a BCSettings.bcpkg. Then try Tools menu -> Restore to Factory Defaults. Fully reboot your machine, and then restart BC4 with a simple text comparison by loading BC4 first, loading a blank text compare, and then loading a pair of plain .txt files into the compare. How does this behave? We can then re-work in your previous workflow or settings a few at a time to try and find the offending culprit.

[hraftery]

Another data point for you:

Mac Studio with Studio Display via Thunderbolt - scrolling is very jerky with big delays.

Move the Window to the secondary LG QHD via USB C - smooth as silk ???

[Aaron]

Hello,

Which Max Studio hardware are you using? Does it have the M1 Max chip or M1 Ultra?

[hraftery]

M1 Max. Pairs quite poorly with the Studio Display I must say. The $7000 experience is nothing on the $2000 iMac's of old. Dimming, wake-from-sleep, boot time, bulkiness. Quality has taken a dive.

But still, this is a weird one!

[Aaron]

We've seen some mixed performance reports on scrolling behavior when external displays. Most of our tests and reports are from laptops also using external displays where, somewhat oddly, there are scenarios where the performance is better on an external and worse on internal (laptop), where others are worse on the external but better on the internal. Resolution and DPI are likely factors, as well as the overall BC4 window width and height, though it isn't quite one-to-one, and there are some other factors at play.

We've also seen some potential issues pop-up depending on M1 vs. M1 Max that we're still investigating. We appreciate the extra info, and having multiple monitors of varying resolution is helpful to know.

We're working towards a private technical test of BC5, but in the meantime, I would suggest subscribing to the News and Announcements sub-forum for email notifications. We'll post there as we get ready for a more widespread testing opportunities.

[MScott]

I am also experiencing this choppy scrolling behavior. My configuration is:

• Mac Studio M1 Ultra with 64GB RAM
• Single 4k Dell display running at 2560 x 1440.
• Mac OS Ventura 13.2
• Beyond Compare v 4.4.4

I'm comparing 32GB (12,483 files spread across 134 folders) of photos located on a NAS.

[Aaron]

Hello,

Please update to BC 4.4.5, which we *just* released, that has some improvements for this behavior. We've had a variety of performance reports, from 'not great' to 'unusable' and 4.4.5's fix seems to help the most users in the more in the extreme cases. It might still feel a little sluggish, but hopefully better, and the overhaul we can do for (our eventual) BC5 should bring significant improvements.

Update: And let us know how 4.4.5 is! We've appreciated the help and broad hardware/OS configurations to help track this down.

[MScott]

Aaron,

Thank you for the reply. I upgraded tonight and I can report that 4.4.5 is definitely a step in the right direction. It does still feel a little sluggish as you stated, but yes, better. I look forward to BC5 whenever it comes out.

[Chris]

BC 4.4.6 is out now; it contains another fix for slow scrolling on macOS.