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def potential_clock_ids
[].tap do |clock_ids|
%i[
CLOCK_MONOTONIC_RAW
CLOCK_UPTIME_RAW
CLOCK_UPTIME
CLOCK_MONOTONIC
CLOCK_MONOTONIC_FAST
CLOCK_BOOTTIME
CLOCK_REALTIME
].each do |c|
clock_ids << { name: c, value: Process.const_get(c)} if Process.const_defined?(c)
end
end
end
clock_ids = potential_clock_ids
puts "Using the following clock ids: #{clock_ids.join(', ')}"
def resolutions_of(clock_id)
counts = Hash.new(0)
1_000_000.times do
val = Process.clock_gettime(clock_id, :nanosecond)
res = if (val % 1_000_000_000).zero?
1
elsif (val % 1_000_000).zero?
1e-3
elsif (val % 1_000).zero?
1e-6
else
1e-9
end
counts[res] += 1
end
counts
end
data = { platform: RUBY_PLATFORM, clock_ids: {} }
clock_ids.each do |clock_info|
name = clock_info[:name]
clock_id = clock_info[:value]
resolutions = resolutions_of(clock_id)
data[:clock_ids][name] = resolutions.transform_keys(&:to_s)
end
require 'yaml'
puts YAML.dump(data)
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