Understanding TruffleRuby – the Ruby Truffle interpreter

TruffleRuby is a high-performance implementation of the Ruby programming language on GraalVM that is built on Truffle. In this section, we will explore some of the language-specific concepts, with code examples, to gain a good understanding of Ruby implementation on GraalVM.

Installing TruffleRuby

TruffleRuby, too, does not come by default with GraalVM installation. You'll have to download and install it using the Graal updater tool. To install TruffleRuby, use the following command:

gu install ruby

After installing Ruby, we have to run some post-install scripts to make OpenSSL C extensions work. We need to run post_install_hook.sh, which you will find under the ruby/lib/truffle directory. Let's test the installation with a simple Ruby application:

print "enter a "
a = gets.to_i
print "Enter b "
b = gets.to_i
c = a + b
puts "Result " + c.to_s

The preceding code...