activerecord-import/benchmarks/lib/output_to_html.rb

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require 'erb'
module OutputToHTML
TEMPLATE_HEADER =<<"EOT"
<div>
All times are rounded to the nearest thousandth for display purposes. Speedups next to each time are computed
before any rounding occurs. Also, all speedup calculations are computed by comparing a given time against
the very first column (which is always the default ActiveRecord::Base.create method.
</div>
EOT
TEMPLATE =<<"EOT"
<style>
td#benchmarkTitle {
border: 1px solid black;
padding: 2px;
font-size: 0.8em;
background-color: black;
color: white;
}
td#benchmarkCell {
border: 1px solid black;
padding: 2px;
font-size: 0.8em;
}
</style>
<table>
<tr>
<% columns.each do |col| %>
<td id="benchmarkTitle"><%= col %></td>
<% end %>
</tr>
<tr>
<% times.each do |time| %>
<td id="benchmarkCell"><%= time %></td>
<% end %>
</tr>
<tr><td>&nbsp;</td></tr>
</table>
EOT
def self.output_results( filename, results )
html = ''
results.each do |result_set|
columns, times = [], []
result_set.each do |result|
columns << result.description
if result.failed
times << "failed"
else
time = result.tms.real.round_to( 3 )
speedup = ( result_set.first.tms.real / result.tms.real ).round
if result == result_set.first
times << "#{time}"
else
times << "#{time} (#{speedup}x speedup)"
end
end
end
template = ERB.new( TEMPLATE, 0, "%<>")
html << template.result( binding )
end
File.open( filename, 'w' ){ |file| file.write( TEMPLATE_HEADER + html ) }
end
end