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Last active Jul 28, 2022
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logstash grok filter benchmark script


  • JDK 8/9/11 (oracle or openjdk)

Steps to setup the scripts:

mkdir benches
cd benches
curl | tar -zxf - 
cd logstash-7.6.0
sed -i.bak 's/gem \"benchmark-ips\", :group => :development/gem \"benchmark-ips\"/g' Gemfile   
bin/logstash-plugin update

To run the benchmarks:

bin/ruby benchmark_grok.rb

# encoding: utf-8
require_relative "lib/bootstrap/environment"
LogStash::Bundler.setup!({:without => [:build, :development]})
require "logstash-core"
require "logstash/environment"
require "logstash/plugin"
require 'benchmark/ips'
line = ' - - [13/Jun/2015:21:14:28 +0000] "GET /blog/geekery/xvfb-firefox.html HTTP/1.1" 200 10975 "-" "Mozilla/5.0 (compatible; Baiduspider/2.0; +"'
pattern = '%{IPORHOST:clientip} %{USER:ident} %{USER:auth} \[%{HTTPDATE:timestamp}\] "%{WORD:verb} %{DATA:request} HTTP/%{NUMBER:httpversion}" %{NUMBER:response:int} (?:-|%{NUMBER:bytes:int}) %{QS:referrer} %{QS:agent}'
# grok plugin setup
grok_plugin = LogStash::Plugin.lookup("filter", "grok").new("match" => ["message", pattern])
# do the benchmark
Benchmark.ips do |x|
x.time = 30
x.warmup = 10"grok_plugin") do
# we need to create a new event on each iteration since it's modified by grok
event ="message" => line)
#"grok_plugin_2") do
# event ="message" => line)
# grok_plugin_2.filter(event)
# end! # necessary only with multiple reports
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Budman17r commented Feb 9, 2017

I can't get this to run how do you get Jruby to respond to Ruby?

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guyboertje commented Oct 6, 2017

You create a symlink in the JRuby bin folder ruby -> jruby

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esg-llachance commented Mar 2, 2018

Is this available as a docker image?

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vmavromatis commented Jul 10, 2018

Thanks. For me I needed sudo for bundler: sudo gem install bundler

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brianjolly commented Aug 17, 2018

@esg-llachance, fwif I'm running it interactively in docker with this:
docker run -it --rm --name grok -v "$PWD":/benches -w /benches jruby /bin/bash

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phihag commented Oct 8, 2019

@brianjolly When I run rake bootstrap, it says bash: rake: command not found.

Running jruby -S gem install rake && jruby -S rake shows another error message, Gem::MissingSpecVersionError: Could not find 'json' (~> 1) - did find: [json-2.2.0-java]. Can I update the Gemfile somehow, or use another docker image?

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brianjolly commented Nov 7, 2019

Hi @phihag, these are my setup steps inside the container:

docker run -it --rm --name grok -v "$PWD":/benches -w /benches jruby /bin/bash
cd logstash
rake bootstrap
cd ..
bundle update --bundler
bundle install

bundle exec ruby benchmark_grok.rb

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jsvd commented Feb 14, 2020

The script and instructions have been updated to run with logstash 7.6.0

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