From 2f71f6bb82c561b0c0ac31b345673a6e6847efe3 Mon Sep 17 00:00:00 2001 From: John Hawthorn Date: Tue, 11 Jan 2022 09:10:23 -0800 Subject: Speed up and avoid kwarg hash alloc in Time.now Previously Time.now was switched to use Time.new as it added support for the in: argument. Unfortunately because Class#new is a cfunc this requires always allocating a Hash. This commit switches Time.now back to using a builtin time_s_now. This avoids the extra Hash allocation and is about 3x faster. $ benchmark-driver -e './ruby;3.1::~/.rubies/ruby-3.1.0/bin/ruby;3.0::~/.rubies/ruby-3.0.2/bin/ruby' benchmark/time_now.yml Warming up -------------------------------------- Time.now 6.704M i/s - 6.710M times in 1.000814s (149.16ns/i, 328clocks/i) Time.now(in: "+09:00") 2.003M i/s - 2.112M times in 1.054330s (499.31ns/i) Calculating ------------------------------------- ./ruby 3.1 3.0 Time.now 7.693M 2.763M 6.394M i/s - 20.113M times in 2.614428s 7.278710s 3.145572s Time.now(in: "+09:00") 2.030M 1.260M 1.617M i/s - 6.008M times in 2.960132s 4.769378s 3.716537s Comparison: Time.now ./ruby: 7693129.7 i/s 3.0: 6394109.2 i/s - 1.20x slower 3.1: 2763282.5 i/s - 2.78x slower Time.now(in: "+09:00") ./ruby: 2029757.4 i/s 3.0: 1616652.3 i/s - 1.26x slower 3.1: 1259776.2 i/s - 1.61x slower --- benchmark/time_now.yml | 3 +++ 1 file changed, 3 insertions(+) create mode 100644 benchmark/time_now.yml (limited to 'benchmark') diff --git a/benchmark/time_now.yml b/benchmark/time_now.yml new file mode 100644 index 0000000000..f6d6a31489 --- /dev/null +++ b/benchmark/time_now.yml @@ -0,0 +1,3 @@ +benchmark: + - 'Time.now' + - 'Time.now(in: "+09:00")' -- cgit v1.2.3