Move HTML lexer benchmarks to a separate directory

benchmark/html/lexer/lexer_bench.rb

@@ -0,0 +1,9 @@
+require_relative '../../benchmark_helper'
+
+html = read_html
+
+Benchmark.ips do |bench|
+  bench.report 'lex HTML' do
+    Oga::XML::Lexer.new(html, :html => true).advance { }
+  end
+end

benchmark/html/lexer/void_element_bench.rb

@@ -0,0 +1,23 @@
+require_relative '../../benchmark_helper'
+
+content  = ''
+max_size = 5 * 1024 * 1024
+
+while content.bytesize <= max_size
+  content << "<br>"
+end
+
+html      = "<body>#{content}</body>"
+html_caps = "<body>#{content.upcase}</body>"
+
+Benchmark.ips do |bench|
+  bench.report 'void elements' do
+    Oga::XML::Lexer.new(html, :html => true).advance { }
+  end
+
+  bench.report 'void elements caps' do
+    Oga::XML::Lexer.new(html_caps, :html => true).advance { }
+  end
+
+  bench.compare!
+end