[KPhotoAlbum] Very, very weird performance problem

Robert Krawitz rlk at alum.mit.edu
Sun May 20 04:32:51 CEST 2018


Saw the same phenomenon on another directory:

$ /usr/bin/time cat /tmp/files.out |xargs cat | dd of=/dev/null bs=10485760
0.00user 0.00system 0:00.01elapsed 30%CPU (0avgtext+0avgdata 1444maxresident)k
0inputs+0outputs (0major+118minor)pagefaults 0swaps
cat: .thumbnails: Is a directory
0+920306 records in
0+920306 records out
125351425478 bytes (125 GB, 117 GiB) copied, 1718.6 s, 72.9 MB/s
[2(rlk)||{!57}<rlk-mobile>/mnt_images2/images/7dmk2/dcim/110eos7d]
$ /usr/bin/time sort /tmp/files.out |xargs cat | dd of=/dev/null bs=10485760
0.00user 0.00system 0:00.02elapsed 75%CPU (0avgtext+0avgdata 2448maxresident)k
600inputs+0outputs (1major+309minor)pagefaults 0swaps
cat: .thumbnails: Is a directory
0+914731 records in
0+914731 records out
125351425478 bytes (125 GB, 117 GiB) copied, 1538.5 s, 81.5 MB/s

-- 
Robert Krawitz                                     <rlk at alum.mit.edu>

***  MIT Engineers   A Proud Tradition   http://mitathletics.com  ***
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