Adds benchmark for ipynbdiff

Simple utility to compute running time for large and small notebooks

vendor/gems/ipynbdiff/Gemfile.lock

@@ -9,11 +9,14 @@ GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.2)
+    benchmark-memory (0.2.0)
+      memory_profiler (~> 1)
     binding_ninja (0.2.3)
     coderay (1.1.3)
     diff-lcs (1.5.0)
     diffy (3.4.2)
     json (2.6.2)
+    memory_profiler (1.0.0)
     method_source (1.0.0)
     parser (3.1.2.0)
       ast (~> 2.4.1)
@@ -53,6 +56,7 @@ PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
+  benchmark-memory (~> 0.2.0)
   bundler (~> 2.2)
   ipynbdiff!
   pry (~> 0.14)

vendor/gems/ipynbdiff/ipynbdiff.gemspec

@@ -30,4 +30,5 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rake', '~> 13.0'
   s.add_development_dependency 'rspec', '~> 3.10'
   s.add_development_dependency 'rspec-parameterized', '~> 0.5.1'
+  s.add_development_dependency 'benchmark-memory', '~>0.2.0'
 end

vendor/gems/ipynbdiff/spec/test_helper.rb

+BASE_PATH = File.join(File.expand_path(File.dirname(__FILE__)),  'testdata')
+
+FROM_PATH = File.join(BASE_PATH, 'from.ipynb')
+TO_PATH = File.join(BASE_PATH, 'to.ipynb')
+
+FROM_IPYNB = File.read(FROM_PATH)
+TO_IPYNB = File.read(TO_PATH)
+
+def input_for_test(test_case)
+  File.join(BASE_PATH, test_case, 'input.ipynb')
+end
+
+def expected_symbols(test_case)
+  File.join(BASE_PATH, test_case, 'expected_symbols.txt')
+end
+
+def expected_md(test_case)
+  File.join(BASE_PATH, test_case, 'expected.md')
+end
+
+def expected_line_numbers(test_case)
+  File.join(BASE_PATH, test_case, 'expected_line_numbers.txt')
+end