MemoryProfiler
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MemoryProfiler | bullet | |
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6 | 27 | |
1,658 | 6,984 | |
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3.4 | 7.7 | |
11 months ago | 3 months ago | |
Ruby | Ruby | |
MIT License | MIT License |
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MemoryProfiler
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Suggestions for how to reduce memory usage
Wire the memory_profiler into an around_action to identify your bloaty actions.
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A Deep Dive into Memory Leaks in Ruby
The memory_profiler gem offers a very simple API and a detailed (albeit a little overwhelming) allocated and retained memory report — that includes the classes of objects that are allocated, their size, and where they were allocated. It's straightforward to add to our leaky program.
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Ok y’all. How can we get this kind of real-time memory profiling in Ruby? Does it already exist? Is anyone working on this?
memory_profiler
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Advanced ActiveRecord Querying - With Benchmarks!
We don't need to rely upon a priori reasoning only, we can use memory_profiles and benchmark_ips to compare the memory consumption and iterations per second of each solution.
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Is there a more efficient way to do these permutation calculations?
Either https://github.com/tmm1/stackprof for cpu or https://github.com/SamSaffron/memory_profiler for memory. In practice profiling and removing allocations also gives a large perf boost.
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Reduce memory consumption with a custom ActiveRecord attribute
Our project has one endpoint which gets called quite often. So, I profiled it with memory profiler and saw a line pointing to hstore.rb.
bullet
- What was the name of the gem that finds all unindexed foreign keys?
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Ban 1+N in Django
Rails has Bullet[0] to help identify and warn you against N+1
Does Django have anything active? Quick search revealed nplusone[1] but its been dead since 2018.
[0] https://github.com/flyerhzm/bullet
[1] https://github.com/jmcarp/nplusone
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Inherited rails app - what the hell are all these rack timeout lines in the log?
Without seeing more of the app, it's tough to say for certain, but one gem you might find helpful is the [bullet](https://github.com/flyerhzm/bullet) gem -- set this up in the app then start browsing around the app in development. If you have any N+1 queries or other minor optimizations that could be done it will inform you about them.
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A Guide to Memoization in Ruby
Getting rid of N+1 queries - This can help improve the speed of an app. The Bullet or Prosopite gems can give a lending hand here. The N+1 Dilemma — Bullet or Prosopite? entails a brief comparison of both.
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Understanding N and 1 queries problem
There's a Ruby gem called Bullet that identifies and warns developers about N+1 problems. You can also have it fail tests if detected.
I don't know if the approach is possible with every ORM or if it's just leveraging some Ruby perks, but I can't think of a good reason why you wouldn't use the equivalent everywhere.
https://github.com/flyerhzm/bullet
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Help with N+1 problem.
You might consider adding the bullet gem as a development requirement and see what it tells you, it's generally pretty good at spotting n-queries and letting you know how to fix them.
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Understanding and Fixing N+1 Query
As a Rails developer, recently I found Bullet [0] which helps massively in dealing with eager loading. For some reason I expected the framework to manage this sort of thing for me, even when Rails actually does a ton out of the box already. Only while refactoring I picked up on queries dragging performance. Oh well...
[0] https://github.com/flyerhzm/bullet
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How do you find the cause of slowness in your app?
This is good advice, it'll likely pick out some glaring issues right away. I would generally recommend looking at DB queries here too and recommend Bullet, but most software like DataDog, AppSignal etc will often also point N+1 and issues like it out.
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Yet Another Post About N + 1 Queries
In order to find all those N + 1 queries that are slowing down in your application, the community recommends using the Bullet gem.
- What are the main suspects in a really slow Rails app?
What are some alternatives?
rack-mini-profiler - Profiler for your development and production Ruby rack apps.
prosopite - :mag: Rails N+1 queries auto-detection with zero false positives / false negatives
Timeasure - Transparent method-level wrapper for profiling purposes in Ruby
Peek - Take a peek into your Rails applications.
perftools.rb - gperftools for ruby code
Derailed Benchmarks - Go faster, off the Rails - Benchmarks for your whole Rails app
memray - Memray is a memory profiler for Python
benchmark-ips - Provides iteration per second benchmarking for Ruby
ruby-prof - A ruby profiler. See https://ruby-prof.github.io for more information.