#crystal-vs-golang

Compare with golang to check crystal's concurrency ability.

#Why is golang?

Crystal has the sample CONCURRENCY MODEL (using channels) like Go, we all konwn that Golang has a good concurrency ability and It's very hot last frew yeas.

Compare with it, we can more easily to check the crystal concurrency, is Powerful or Not.

#Testing System

• My MacBook Air (11-inch, Early 2015), 1.6 GHz Intel Core i5 (2 core), 4 GB 1600 MHz DDR3
• Crystal v0.21.1
• Golang v1.7.3

#Examples

#countfilelines

This is Crystal official example to count the total number of some files. For this example, we want to get Crystal Source Code lines.

Run make countfilelines and get output:

real	0m17.833s
user	0m9.668s
sys	0m8.123s
finish countfilelines-crystal test

real	0m8.549s
user	0m3.209s
sys	0m6.861s
finish countfilelines-go test

You can see that Go is about 2x faster than Crystal.

#sleep

In order to ignore the different execute time running in each fiber, we just do sleep 1ms and open 100_000 fibers at once.

Run make sleep and get output:

real	0m12.901s
user	0m3.337s
sys	0m8.733s
finish sleep-crystal test

real	0m6.208s
user	0m5.011s
sys	0m1.146s
finish sleep-go test

You can see that Go is about 2x faster than Crystal and Crystal cost too much time on system time.