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| author | Andrew White <andyw@pixeltrix.co.uk> | 2012-07-02 07:05:17 +0100 |
|---|---|---|
| committer | Andrew White <andyw@pixeltrix.co.uk> | 2012-07-02 07:05:17 +0100 |
| commit | 822c858a1a5cad49274404dbc10b7f8107b06cc3 (patch) | |
| tree | 3a4a2e509ba64d04900a874988f04d19e446242b /activesupport/test/core_ext | |
| parent | 83302a4c1384c18bec7128ec561eb6a8aa674275 (diff) | |
| download | rails-822c858a1a5cad49274404dbc10b7f8107b06cc3.tar.gz rails-822c858a1a5cad49274404dbc10b7f8107b06cc3.tar.bz2 rails-822c858a1a5cad49274404dbc10b7f8107b06cc3.zip | |
Improve performance of DateTime#seconds_since_unix_epoch
Calculate the seconds since the UNIX epoch using the difference in
Julian day numbers from the epoch date. By reducing the Rational math
to just the offset component this gives a significant improvement.
Benchmark:
Calculating --------------------------------------------
new 27733 i/100ms
current 15031 i/100ms
new 27737 i/100ms
current 15549 i/100ms
--------------------------------------------------------
new 548182.1 (±0.9%) i/s - 2745567 in 5.008943s
current 216380.9 (±1.6%) i/s - 1082232 in 5.002781s
new 510281.9 (±1.2%) i/s - 2551804 in 5.001525s
current 219858.3 (±1.8%) i/s - 1103979 in 5.023039s
Diffstat (limited to 'activesupport/test/core_ext')
| -rw-r--r-- | activesupport/test/core_ext/date_time_ext_test.rb | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/activesupport/test/core_ext/date_time_ext_test.rb b/activesupport/test/core_ext/date_time_ext_test.rb index 183d58482d..21b7efdc73 100644 --- a/activesupport/test/core_ext/date_time_ext_test.rb +++ b/activesupport/test/core_ext/date_time_ext_test.rb @@ -427,6 +427,7 @@ class DateTimeExtCalculationsTest < ActiveSupport::TestCase def test_to_i assert_equal 946684800, DateTime.civil(2000).to_i + assert_equal 946684800, DateTime.civil(1999,12,31,19,0,0,Rational(-5,24)).to_i end protected |