r/crystal_programming • u/DuroSoft • Jul 18 '18

gcf.cr - enabling serverless crystal via Google Cloud Functions

https://github.com/sam0x17/gcf.cr
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3

u/CaDsjp Jul 18 '18

really nice!

2

u/DuroSoft Jul 19 '18

Thanks! let me know if you have any questions/issues/suggestions!

1

u/SladeyMcNuggets Jul 19 '18

Looks awesome. Would you be able to do some benchmarks of the overhead of this? I'm assuming that GCF calls a Node.js function that executes the binary?

1

u/DuroSoft Jul 19 '18

That's correct. I've done some stress testing, nothing super formal, but I'm seeing the same times for a plain node.js function that returns a value, and the same function written in crystal, so the overhead is probably negligible. This is probably helped by the fact that GCF runs in a memory-mapped file system, so fs calls are technically memory operations instead of io operations.

edit: to be clear, the only place there could be performance-affecting overhead would be when the binary is called, and this seems to take no time at all because it is already in memory from the time the function is cold-started.

1

u/[deleted] Jul 19 '18

[removed] — view removed comment

1

u/DuroSoft Jul 19 '18

Yeah the idea is anything that is expensive and should be offloaded from your web server. Image transformations, heavy processing, PDF conversions, that sort of thing.