Following:
Doing dev work in docker on a mac may be workable!
| Rails Boot | Slowdown | |
|---|---|---|
| Host | 5.64 | |
| Virtual Box | 6.15 | 9% |
| Virtual Box + Docker | 8.78 | 55% |
| Docker Mac (cached) | 11.2 | 98% |
| Docker Mac (uncached) | 15.7 | 178% |
Note: for Docker setup on virtual box has gems are in AUFS and working directory in a mounted volume. On mac the working directory is a cache mounted volume. It is likely performance would improve if overlay was used or gems are mounted on the host to avoid virtualized file system.
Docker for Mac … uncached:
sams-MBP:discourse sam$ time d/rails r 'puts'
real 0m19.035s
user 0m0.016s
sys 0m0.014s
sams-MBP:discourse sam$ time d/rails r 'puts'
real 0m15.702s
user 0m0.017s
sys 0m0.014s
sams-MBP:discourse sam$ time d/rails r 'puts'
real 0m17.290s
user 0m0.016s
sys 0m0.011s
Docker for mac … cached
sams-MBP:discourse sam$ time d/rails r 'puts'
real 0m11.430s
user 0m0.018s
sys 0m0.012s
sams-MBP:discourse sam$ time d/rails r 'puts'
real 0m11.293s
user 0m0.019s
sys 0m0.012s
sams-MBP:discourse sam$ time d/rails r 'puts'
real 0m11.995s
user 0m0.017s
sys 0m0.012s
Ruby installed on host
sams-MBP:discourse sam$ time bin/rails r 'puts'
real 0m7.204s
user 0m4.541s
sys 0m1.780s
sams-MBP:discourse sam$ time bin/rails r 'puts'
real 0m5.644s
user 0m4.319s
sys 0m1.254s
sams-MBP:discourse sam$ time bin/rails r 'puts'
real 0m5.646s
user 0m4.329s
sys 0m1.256s
VirtualBox + docker on the same host
sam@ubuntu:~/Source/discourse$ time d/rails r 'puts'
real 0m12.519s
user 0m0.016s
sys 0m0.012s
sam@ubuntu:~/Source/discourse$ time d/rails r 'puts'
real 0m8.786s
user 0m0.016s
sys 0m0.000s
sam@ubuntu:~/Source/discourse$ time d/rails r 'puts'
real 0m8.733s
user 0m0.008s
sys 0m0.004s
VirtualBox, no docker
real 0m9.386s
user 0m5.332s
sys 0m1.692s
sam@ubuntu:~/Source/discourse$ time bin/rails r 'puts'
real 0m6.032s
user 0m4.796s
sys 0m1.116s
sam@ubuntu:~/Source/discourse$ time bin/rails r 'puts'
real 0m6.155s
user 0m4.924s
sys 0m1.104s
sam@ubuntu:~/Source/discourse$ time bin/rails r 'puts'
real 0m6.112s
user 0m4.804s
sys 0m1.180s