- rack-mini-profiler: Swiss-army knife profiler for rails apps
- flamegraph: Nice and useful timeline visualizer for debugging long methods.
- memory_profiler: Easy to use memory profiler for memory consuming methods.
- heapy: Memory dump analyzer for advanced memory analysis.
- foreman-tracer: great tool for unintrusive tracing by lzap.
Shimon Shtein ShimShtein
ShimShtein
/ arel_like.rb
Created
February 4, 2018 21:24
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| arel = Nic::Base.arel_table | |
| like_ast = arel[:identifier].matches(pattern, InterfaceCleaner::ESCAPE_CHAR, true) | |
| Nic::Base.where(like_ast).pluck(:identifier) |
ShimShtein
/ sanitize_sql_like.rb
Created
February 4, 2018 20:29
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| class InterfaceCleaner | |
| include ActiveRecord::Sanitization | |
| ESCAPE_CHAR = '\\' | |
| def self.nic_pattern_to_like(nic) | |
| sanitize_sql_like(nic, ESCAPE_CHAR).tr('*', '%') | |
| end | |
| def self.ignored_interface_like_patterns |
ShimShtein
/ where.rb
Created
February 4, 2018 19:53
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| Nic::Base.where('identifier LIKE ?', pattern) |
ShimShtein
/ erb_strip.rb
Last active
August 13, 2017 18:24
Inspecting provisioning templates with Rubocop
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| class ErbStrip | |
| ERB_REGEX = /(?<start_tag><%[-=]?)(?<script>([^#]).*?)(?<end_tag>-?%>)/m | |
| def initialize(source) | |
| @source = source | |
| end | |
| def strip | |
| out = '' | |
| current_position = 0 |
ShimShtein
/ zz_replace_bundler_source.rb
Created
July 13, 2017 13:46
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| rubygems = @sources.rubygems_sources.first | |
| rubygems.replace_remotes([URI('http://my_new_local_gemsource:8808')]) |
ShimShtein
/ 000 - preformance deep dive resources.md
Last active
December 3, 2018 14:41
Foreman performance analysis deep dive
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| diff --git a/Gemfile b/Gemfile | |
| index b86d9ec..9eb4275 100644 | |
| --- a/Gemfile | |
| +++ b/Gemfile | |
| @@ -22,6 +22,14 @@ gem 'deep_cloneable', '~> 2.0' | |
| gem 'foreigner', '~> 1.4.2' | |
| gem 'validates_lengths_from_database', '~> 0.2.0' | |
| +gem 'public_suffix', '<= 1.4.6' | |
| +gem 'nokogiri', '<= 1.6.8' |
ShimShtein
/ Dynflow bottlenecks.md
Last active
January 13, 2018 04:27
Dynflow performance analysis.
Why do we need indifferent_hash while saving?
"/home/shim/Documents/foreman/dynflow/lib/dynflow/utils.rb:60:in `indifferent_hash'",
"/home/shim/Documents/foreman/dynflow/lib/dynflow/persistence_adapters/sequel.rb:268:in `extract_metadata'",
"/home/shim/Documents/foreman/dynflow/lib/dynflow/persistence_adapters/sequel.rb:226:in `prepare_record'",
"/home/shim/Documents/foreman/dynflow/lib/dynflow/persistence_adapters/sequel.rb:236:in `save'",
"/home/shim/Documents/foreman/dynflow/lib/dynflow/persistence_adapters/sequel.rb:125:in `save_action'",