Add Python polyglot

ruby/json/truffle-node-polyglot/README.md

@@ -5,4 +5,7 @@ docker build -t json-truffle-node .
 docker run -it json-truffle-node
 
 ## Run cpusampler 
-ruby --polyglot --experimental-options --single-threaded --cpusampler --cpusampler.Mode=statements test-profile.rb
+ruby --polyglot --experimental-options --single-threaded --cpusampler --cpusampler.Mode=statements test-profile.rb
+
+## Run Python example
+ruby --jvm --polyglot test-time-py.rb

ruby/json/truffle-node-polyglot/run.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
-echo 'Run IPS test'
-ruby --jvm --polyglot --experimental-options --single-threaded test-ips.rb
+#echo 'Run IPS test'
+#ruby --jvm --polyglot --experimental-options --single-threaded test-ips.rb
 echo 'Run time benchmark'
 ruby --jvm --polyglot --experimental-options --single-threaded test-time.rb
 # To run ruby polyglot in native mode. Image rebuild is needed.

ruby/json/truffle-node-polyglot/test-time-py.rb

@@ -0,0 +1,16 @@
+require 'benchmark'
+
+Benchmark.bm do |x|
+  x.report {
+    jobj = Polyglot.eval('python', 'import json; \
+      text = open(\'./1.json\', \'r\').read(); \
+      json.loads(text);')
+    coordinates = Polyglot.as_enumerable(jobj[:coordinates])
+    x = y = z = 0
+    coordinates.each do |coord|
+      x += coord['x']
+      y += coord['y']
+      z += coord['z']
+    end
+  }
+end

ruby/json/truffle/test-time.rb

@@ -1,7 +1,7 @@
 require 'benchmark'
 require 'json'
 
-enchmark.bm do |x|
+Benchmark.bm do |x|
   x.report {
     jobj = JSON.parse(File.read('1.json'))
     coordinates = jobj['coordinates']