Comparison speed dropped significantly with v12.0 using FTP

[manitz]

Since the update to version 12.0, the comparison speed dropped significantly when using FTP. I am using FFS on Windows 10 and WiFi FTP Server on three different Android devices (A10, A11, and A13). There is no difference between plain FTP and FTPes (SSL/TLS). The file transfer itself is as fast as before the update.

Should I downgrade to a version below 12? Any help is is appreciated.

[therube]

You can downgrade & see if your speed is regained.

And I'll assume you didn't change the compare method (like from Time/Size to Content, which would take much longer).

[manitz]

I downgraded to v 11.29 and the comparison speed is regained. And I certainly did not change the comparison method.

[Zenju]

How big is the performance difference for the comparison phase between the versions?

Do you see an improvement with the following version? (Reverts back to libcurl 1.86 as used in FFS 11.29)
https://www.mediafire.com/file/pp4zs4vn0ztlzn6/FreeFileSync_12.1_%255BBeta%255D_Windows_Setup%25282%2529.exe

[manitz]

I ran some tests. Every test is run once only. FFS running on Windows 10, WiFi FTP Server on Android.

Comparison times for about 11,000 files in seconds.

            Huawei P30 Lite    Samsung Tab S5e    Samsung Tab A7 Lite
            Android 10        Android 11        Android 13

FFS 11.29         48                 28                 32
FFS 12.0        143                110                115
FFS 12.1. Beta         34             27             33


So libcurl seems to be responsible for the slower speed.
Unfortunately, my table looks a little bit scrambled. The preview looks nice but the submitted table doesn't.

[Zenju]

That's a forum software issue. Should be fixed now (tabs are automatically replaced with spaces)

                Huawei P30 Lite   Samsung Tab S5e    Samsung Tab A7 Lite
                  Android 10       Android 11         Android 13

FFS 11.29              48             28                 32
FFS 12.0              143            110                115
FFS 12.1. Beta         34             27                 33


[Zenju]

This seems to be the following bug: https://github.com/curl/curl/issues/10389

Should be solved with the following version which implements the bugfix suggested in the ticket:
https://www.mediafire.com/file/bb6pz2iwc2fg8ws/FreeFileSync_12.1_%255BBeta%255D_Windows_Setup%25283%2529.exe

[manitz]

Thank you for investigating and solving the problem.