django-auto-prefetching
haxl
django-auto-prefetching | haxl | |
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1 | 10 | |
227 | 4,228 | |
- | 0.0% | |
4.6 | 0.0 | |
5 months ago | 6 months ago | |
Python | Haskell | |
MIT License | BSD 3-clause "New" or "Revised" License |
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django-auto-prefetching
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Ban 1+N in Django
Shameless plug - I ran into this while developing REST interfaces with Django and built django-auto-prefetching: https://github.com/GeeWee/django-auto-prefetching
It essentially travels your DRF serializer tree and builds an auto-prefetched query automatically without you needing to do any work.
Back when I still worked actively on it, I wanted to monkey-patch models to track whether or not n+1 was happening, and if it was, automatically do pre-fetching, so instead of an n+1 problem you'd end up with just a "3-4 queries when it could've been 1" problem - which is much more palatable. Never got around to that part though.
haxl
- Simon Peyton Jones – Haskell is useless [video]
- Is Haskell gaining or losing popularity?
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Algebraic Effects: Another mistake carried through to perfection?
Sounds a bit like Haxl. From this page:
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Ban 1+N in Django
+1. The JS event loop auto-monad-izing Promises into Haxl [1]-esqe trees of implicitly-batched loads has been a big win for us building on JavaScript/TypeScript.
If I had to move to another language, I'd really want to find a "powered by the event loop / dataloader" framework, i.e. Vert.x for Java.
Also, per dataloader, a shameless plug for our ORM that has dataloader de-N+1-ing built natively into all object graph traversals:
https://joist-orm.io/docs/goals/avoiding-n-plus-1s
[1]: https://github.com/facebook/Haxl
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Is Meta decommissioning Sigma?
and Haxl
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11 Companies That Use Haskell in Production
Haxl, a framework for efficient and concise data fetching.
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I would like a job writing Haskell
You mean, Haxl? [1] But AFAIK only a few devs are involved for the development.
[1] https://github.com/facebook/Haxl
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Do You Know Where Haskell Is Used?
Probably, the most googled and well-known example of Haskell application in major companies is the Facebook Meta spam filters. Messages containing spam, links to potential malware and phishing attacks are filtered by Sigma, the system that was rewritten in Haskell in 2015. The choice of language was based, among other things, on performance requirements, the need for pure functions and static typing, as well as the possibility of interactive development. The Haxl framework is used under the bonnet, which the company has open-sourced. You can find more details about the development process and technical aspects in the company’s blog post.
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What are the advantage of Object Oriented languages over Functional languages? Particularly mutability.
Their GitHub still seems pretty active https://github.com/facebook/Haxl
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An Ideal Data-Model-First Development Approach for the real-world apps
Since you mention Any real-world application uses a database or seventeen in the backend, it's probably worth checking out https://github.com/facebook/Haxl as its goal is to allow you to write high-level queries in Haskell and have the library call out to different datasources as efficiently as possible.
What are some alternatives?
pellet - Pellet helps improve your Django app performance by discovering N+1 queries.
fraxl
django-zen-queries - Explicit control over database query execution in Django applications
unagi-streams - Unagi-chan channels for io-streams.
nplusone - Auto-detecting the n+1 queries problem in Python
streamly - High performance, concurrent functional programming abstractions
django-orm-plus
cspmchecker - The library FDR3 uses for parsing, type checking and evaluating machine CSP.
django-seal - Django application providing queryset sealing capability.
stm-conduit - STM-based channels for conduits.
django-cacheops - A slick ORM cache with automatic granular event-driven invalidation.
chaselev-deque - A collection of different packages for CAS based data structures.