# Dockerd performance issues during simultaneous container creation

**URL:** <https://forums.docker.com/t/dockerd-performance-issues-during-simultaneous-container-creation/32094>\
**Category:** General\
**Created:** [May 11, 2017, 4:23am UTC](https://forums.docker.com/t/dockerd-performance-issues-during-simultaneous-container-creation/32094 "2017-05-11T04:23:47Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![abozanich](https://sea3.discourse-cdn.com/docker/user_avatar/forums.docker.com/abozanich/32/15955_2.png) [@abozanich](https://forums.docker.com/u/abozanich)\
**Post date:** [May 11, 2017, 4:23am UTC](https://forums.docker.com/t/dockerd-performance-issues-during-simultaneous-container-creation/32094/1 "2017-05-11T04:23:47Z")

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Hi all,

I’m tinkering with a [small project](https://github.com/boz/ephemerald) that creates/manages a bunch of containers concurrently.

On one of my machines, container creation drops off a cliff when creating more than one container at a time.

I have a small benchmarking script [here](https://github.com/boz/ephemerald/blob/docker-benchmark/_testdata/docker-benchmark.sh) which runs “docker run --rm busybox” X times, with Y of them running at the same time.

The results are below. The last system, running Arch, is the problematic one. The “10 containers, 10 at a time” test is over 10 times slower on Arch than it is on OSX. Both operating systems are on the same hardware (2013 macbook pro), but on Arch it’s running natively rather than in Docker.app’s VM - It _should_ be a lot faster on Arch.

The most obvious change to me at this point is that Arch has 17.04 (17.05 has similar performance), while the others have 17.03.

Any ideas about what is going on here?

```
# Ubuntu i7-6800K CPU @ 3.40GHz, 32GB, Docker Version 17.03.1-ce

Containers Parallelism Runtime (seconds)

01 01 0.76
05 01 4.29
10 01 8.41
10 05 3.48
10 10 3.02
20 10 5.64
20 20 5.32

# OSX 10.12.4 Core i7-4960HQ @ 2.60GHz, Docker version 17.03.1-ce

  Note: Docker running in VM limited to 4 logical cores and 6GB memory:

Containers Parallelism Runtime (seconds)

01 01 1.23
05 01 9.06
10 01 18.48
10 05 5.76
10 10 6.85
20 10 17.92
20 20 26.77

# Arch Core i7-4960HQ @ 2.60GHz, 16GB, Docker Version 17.04.0-ce

Containers Parallelism Runtime (seconds)

01 01 0.76
05 01 4.65
10 01 8.74
10 05 50.29
10 10 27.21
20 10 65.05
20 20 44.40

```

Thanks,  
-Adam