From f58942d2a238128d850384d16067811f8415d43f Mon Sep 17 00:00:00 2001 From: Eric Wong Date: Sun, 17 May 2015 01:26:35 +0000 Subject: use monotonic clock on Ruby 2.1+ The monotonic clock is immune to stepping adjustments so it is more suitable for tracking elapsed time differences. Process.clock_gettime also generates less garbage on 64-bit systems due to the use of Flonum. --- lib/dtas.rb | 12 ++++++++++++ lib/dtas/process.rb | 2 +- 2 files changed, 13 insertions(+), 1 deletion(-) (limited to 'lib') diff --git a/lib/dtas.rb b/lib/dtas.rb index 9fc7253..f11d549 100644 --- a/lib/dtas.rb +++ b/lib/dtas.rb @@ -1,6 +1,18 @@ # Copyright (C) 2013-2015 all contributors # License: GPLv3 or later (https://www.gnu.org/licenses/gpl-3.0.txt) module DTAS # :nodoc: + # try to use the monotonic clock in Ruby >= 2.1, it is immune to clock + # offset adjustments and generates less garbage (Float vs Time object) + begin + ::Process.clock_gettime(::Process::CLOCK_MONOTONIC) + def self.now + ::Process.clock_gettime(::Process::CLOCK_MONOTONIC) + end + rescue NameError, NoMethodError + def self.now # Ruby <= 2.0 + Time.now.to_f + end + end end require_relative 'dtas/compat_onenine' diff --git a/lib/dtas/process.rb b/lib/dtas/process.rb index 5be107f..8c5e8e9 100644 --- a/lib/dtas/process.rb +++ b/lib/dtas/process.rb @@ -51,7 +51,7 @@ module DTAS::Process # :nodoc: pid = spawn(env, cmd, opts) warn [ :spawn, pid, cmd ].inspect if $DEBUG - @spawn_at = Time.now.to_f + @spawn_at = DTAS.now PIDS[pid] = self pid end -- cgit v1.2.3-24-ge0c7