benchmark.rb

$LOAD_PATH << "lib"
require 'benchmark'
require 'sequel'
require 'sequel/adapters/jdbc'

ds = Sequel::JDBC::Dataset.new(Sequel::JDBC::Database.new({}))

Benchmark.bm(10) do |x|
  x.report("timestamp")  { 100000.times { ds.send(:convert_type, Java::JavaSQL::Timestamp.new(0)) } }
  x.report("nil")        { 100000.times { ds.send(:convert_type, nil) } }
end

gistfile1.txt

Before:

                user     system      total        real
timestamp  19.301000   0.000000  19.301000 ( 19.281000)
nil         2.459000   0.000000   2.459000 (  2.459000)

After:

                user     system      total        real
timestamp   2.447000   0.000000   2.447000 (  2.429000)
nil         0.088000   0.000000   0.088000 (  0.088000)