[[!comment format=mdwn
 username="yarikoptic"
 avatar="http://cdn.libravatar.org/avatar/f11e9c84cb18d26a1748c33b48c924b4"
 subject="comment 4"
 date="2022-07-14T17:00:40Z"
 content="""
here are some timings although I think you are right that it should not be any major effect. most likely my slow system is due to [another issue with registerurl](https://git-annex.branchable.com/todo/registerurl__58___do_changes_in_journal___34__in_place__34____63__/#comment-85131966a882ff24431566d146b5634b). But here are some timings showing that it is ok (23ms) to cat 1MB file, and list those 173k files in 17 seconds

```
root@drogon:/mnt/backup/dandi/partial-zarrs/db99e810-3bcf-434f-89cb-ae7476224607/.git/annex/journal# time cat 5a4_81f_MD5E-s560--82188063b1988362cc3050918f493320.log.web >/dev/null

real    0m0.023s
user    0m0.001s
sys     0m0.001s
root@drogon:/mnt/backup/dandi/partial-zarrs/db99e810-3bcf-434f-89cb-ae7476224607/.git/annex/journal# time cat 5a4_81f_MD5E-s560--82188063b1988362cc3050918f493320.log.web >/dev/null

real    0m0.001s
user    0m0.001s
sys     0m0.000s
root@drogon:/mnt/backup/dandi/partial-zarrs/db99e810-3bcf-434f-89cb-ae7476224607/.git/annex/journal# time /bin/ls -1 | wc -l
173882

real    0m17.103s
user    0m0.535s
sys     0m0.173s
root@drogon:/mnt/backup/dandi/partial-zarrs/db99e810-3bcf-434f-89cb-ae7476224607/.git/annex/journal# time touch 1

real    0m0.005s
user    0m0.001s
sys     0m0.000s
root@drogon:/mnt/backup/dandi/partial-zarrs/db99e810-3bcf-434f-89cb-ae7476224607/.git/annex/journal# time bash -c 'echo 2 >> 1'

real    0m0.132s
user    0m0.017s
sys     0m0.010s
root@drogon:/mnt/backup/dandi/partial-zarrs/db99e810-3bcf-434f-89cb-ae7476224607/.git/annex/journal# time rm 1

real    0m0.015s
user    0m0.001s
sys     0m0.000s

# repeated ls
root@drogon:/mnt/backup/dandi/partial-zarrs/db99e810-3bcf-434f-89cb-ae7476224607/.git/annex/journal# time /bin/ls -1 | wc -l
177908

real    0m0.789s
user    0m0.577s
sys     0m0.067s
root@drogon:/mnt/backup/dandi/partial-zarrs/db99e810-3bcf-434f-89cb-ae7476224607/.git/annex/journal# time /bin/ls -1 | wc -l
177978

real    0m1.074s
user    0m0.547s
sys     0m0.077s

```

so if registerurl and others do not list that folder indeed until the point when journal is committed, should be all good
"""]]
