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Contents
if ENV["PROFILE_BAD_LOG_CALLS"] || ($DEBUGLIST || []).include?("log")
# Set PROFILE_BAD_LOG_CALLS=1 in your environment if you want
# to track down logger calls that cause performance problems
#
# Related research here:
# https://github.com/jordansissel/experiments/tree/master/ruby/logger-string-vs-block
#
# Basically, the following is wastes tons of effort creating objects that are
# never used if the log level hides the log:
#
# logger.debug("something happend", :what => Happened)
#
# This is shown to be 4x faster:
#
# logger.debug(...) if logger.debug?
#
# I originally intended to use RubyParser and SexpProcessor to
# process all the logstash ruby code offline, but it was much
# faster to write this monkeypatch to warn as things are called.
require "cabin/mixins/logger"
module Cabin::Mixins::Logger
LEVELS.keys.each do |level|
m = "original_#{level}".to_sym
predicate = "#{level}?".to_sym
alias_method m, level
define_method(level) do |*args|
if !send(predicate)
warn("Unconditional log call", :location => caller[0])
end
send(m, *args)
end
end
end
end # PROFILE_BAD_LOG_CALLS
Version data entries
29 entries across 29 versions & 1 rubygems