archive utility is extremely slow on my Mac M1

ker2x wrote:

I'm unzipping the "2017 train images" archive from https://cocodataset.org/#download1.

The archive is 118k files in 18GB

2. I'm on a MacBook Air M1 2020

3. The zip file is on a USB-C samsung T7 SSD formatted in ExFAT (yes, I know...)

4.

After 5h the task manager reported :

between 30~90% cpu usage

disk usage : ~3GB written, 120GB read1. (????????)

2. i force killed it

3.

used unzip from the command line, after 15mn :

a constant > 90% cpu usage

4. 12GB written, 10GB read (much better, right ?)

5. it's not done yet but it already unzipped 30k file, so I expect it be finished in 1h ? (edit : finished in 55mn)

all files are jpeg between 50KB to 300KB, nothing special.

how come the archive manager is reading so much ? (the info for unzip look good so I don't think it's a task manager problem due to the use of a usb drive)

I expected the I/O to not be optimal since it's exFat, but it's clearly a problem with archive utility. And google show me tons of OLD problem with this tool hanging/freezing or being just very slow.

What's happening ?

I had other much smaller archive too, they succeeded but it took a needlessly long time.

You can try a third party alternative and compare your results...

ex. Keka https://www.keka.io/en/

you can submit your Apple Feedback http://www.apple.com/feedback