cache theme html file

[alessioalex]

Currently if you generate 5000 emails it will synchronously load the theme file 5000 times: https://github.com/eladnava/mailgen/blob/master/index.js#L51

It would be better to keep the theme html file content into memory so that the generate function won't try to read it each time from disk. That would be a massive improvement.

[eladnava]

Hey @alessioalex!

Nice to meet you and thank you for reporting this!

You are absolutely right about this -- I have fixed this behavior by loading the template file once in the package constructor. :)

[alessioalex]

Hey! No problem. I've opened another 2 issues, let me know if you have time to take a look over them or if you need some help. Cool module btw, thanks!

[eladnava]

Excellent, glad you like it :)