Sieve Of Eratosthenes

Sieve of Eratosthenes implemented in Ruby and Go as a monorepo, currently only benchmarked with the Benchmark gem.

Algorithm logic taken from Wikipedia

Further inspiration taken from this gist for Ruby's inbuilt EratosthenesGenerator which exists in the Prime module, as well as a more compact version of the algorithm in the aforementioned link.

For Golang, I adapted the Go Playground version of the Sieve (package sieve_standard), whilst also adapting the Ruby implementation into Go (package sieve).

Requirements

• Ruby (v2.6.5)
• Go (v1.15)

$ gem install benchmark-ips

Instructions

• The Ruby implementation can be run simply using ruby lib/ruby/sieve_benchmark.rb, which, by default, outputs a comparison of the performance of the primes method versus Prime::EratosthenesGenerator as per the example shown in benchmark/ips. Note that it is not yet currently configurable (it will only output primes up to the fixed limit of 100).

• The Golang implementation can be run via go run lib/golang/main.go, which brings up a simple UI to allow selection of the desired sieve algorithm.

For tests: cd lib/golang/sieve or alternatively cd lib/golang/sieve_standard, and run go test ..

Docker

• Golang:

cd lib/golang 
docker build . -t sieve-golang && docker run -it sieve-golang 

• Ruby

cd lib/ruby
docker build . -t sieve-ruby && docker run sieve-ruby

TODO

• Table driven tests for sieve_standard
• Modify EratosthenesSieve in sieve.go to use concurrency.
• Look into Ractor for the Ruby method (which requires an upgrade to Ruby 3.0.0)