speed of cpan module installation

Gotanda.pm #5 2015/06/24

Transcript

1. speed of cpan module installation Shoichi Kaji
2. contens • installation of cpan modules • speed is important • what can I do? • demo • conclusion
3. installation of cpan modules • all you have to do is to type: • cpanm Module • How easy!
4. But
5. if you install a lot of cpan modules, it takes long time!
6. speed is important • If you develop a perl project, it is common to depends on hundreds of cpan modules • Then bootstrapping time is >10minutes • This is A PROBLEM!
7. What can I do? • In QA Hackathon 2015 at Berlin, miyagawa developed cpanm2.0 “menlo”, which will be released a “regular” perl module. • OK, let’s use menlo in parallel!
8. Acme::CPAN::Installer https://github.com/shoichikaji/Acme-CPAN-Installer
9. Acme::CPAN::Installer • With cpanfile.snapshot, 
 install cpan distributions in parallel. • [EXPERIMENTAL]
 With the assumption that dependencies are statically determined,
 resolve distributions name and
 install them in parallel.
10. DEMO
11. result > ls cpanfile cpanfile.snapshot > cat cpanfile requires ‘Plack’; > time carton install … real 0m33.857s > time cpan-installer … real 0m13.344s #### 33sec => 13sec! ####
12. conclusion • cpanm is nice • we can use it as a module • If we install cpan modules in parallel, 
 then we see speed improvement! • I propose that cpan module dependencies must be statically determined.