SnakeViz
unsafe-code-guidelines
SnakeViz | unsafe-code-guidelines | |
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10 | 74 | |
2,235 | 640 | |
- | 1.3% | |
5.2 | 6.9 | |
5 months ago | about 2 months ago | |
Python | ||
GNU General Public License v3.0 or later | Apache License 2.0 |
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SnakeViz
- Alternative to for loop in python ?
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Python Built-in vs Looping
From the same guy, use snakeviz to diagnose code. Video: [9:57] https://www.youtube.com/watch?v=m_a0fN48Alw
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Python 3.11 delivers.
Python profiling is enabled primarily through cprofile, and can be visualized with help of tools like snakeviz (output flame graph can look like this). There are also memory profilers like memray which does in-depth traces, or sampling profilers like py-spy.
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Hey Rustaceans! Got a question? Ask here! (40/2022)!
I'm looking for a Rust equivalent Python's cProfile https://docs.python.org/3/library/profile.html if possible with visualizations like in SnakeViz https://jiffyclub.github.io/snakeviz/
- Scanning Function calls in a script - is there a tool?
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Apply decorator to all functions in a list
If you want stats for only your list of functions, you can do that with pstats, or you could use some third-party tool like https://jiffyclub.github.io/snakeviz/ or myriad other options.
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An efficient way of getting second neighbors of a point in a grid.
I would make a list of tuples where each tuple is (2,0),(-2,0),(0,2),etc... and put those in a list. Then you can use random.choice to pick a random one out of the list. How often are you going to be doing this next to the edge of the grid? If its not that much then I would just try to have it re-draw a new random choice from the list in those cases. This isn't an elegant solution, since it could take an unknown amount of time to draw something valid, but it might be fast enough in practice. Then if that ends up causing issues on the edge cases you could have some logic to select a list to draw from that only contains the valid choices. Also remember, don't assume that some part of your code is the slow part. Always profile it to get some actual information on how long each section is taking so you can optimize the parts of the code that actually need it. I use snakeviz for profiling python code.
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Profiled my Python video game code and then used snakeviz to check for performance bottlenecks
Official site: http://jiffyclub.github.io/snakeviz/
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Pyheatmagic: Profile and view your Python code as a heat map
I've always used snakeviz with the stdlib profiler https://jiffyclub.github.io/snakeviz/
In prod, the pyinstrument profiler has worked well for me https://pyinstrument.readthedocs.io/en/latest/guide.html#pro...
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Need a help to optimize the code when using pandas
its going to be very hard to give advice on this without seeing the code. could you share the relevant code? if you're not sure what the slow part is, i recommend https://jiffyclub.github.io/snakeviz/ it should allow you to see what function is taking long
unsafe-code-guidelines
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Passing nothing is surprisingly difficult
Useful context on the Rust side is this issue [1]. It sounds like some of the author's concerns are addressed already.
[1]: https://github.com/rust-lang/unsafe-code-guidelines/issues/4...
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Blog Post: Non-Send Futures When?
Is this captured by one of the known soundness conflicts? If not then should consider adding it to the list.
- Are crates like vcell and volatile cell still unsound?
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Question: Are there things for Unsafe Rust learn from Zig?
There are some competing proposals for different memory models. Stacked borrows is the current proposal, but there are more work in the approproate WG.
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Let's thank who have helped us in the Rust Community together!
Thank you /u/RalfJung for bringing formal methods to Rust, both through models like Stacked Borrows, by developing miri, and by working on unsafe-code-guidelines which aims to specify exactly what is and isn't allowed in unsafe code (surprisingly, it's an open question as 2023!)
- Questions about ownership rule
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Noob Here: Why doesn't this work?
You could imagine some way to make this safe for example automatically convert &'short &'long mut T to &'short &'short T, but it's non-trivial to prove they are safe at all, not to mention ensuring this is correctly implemented in the compiler. If you're interested there's also a discussion on whether the opposite (& & T to & &mut T) is sound here.
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When Zig is safer and faster than (unsafe) Rust
Agreed! MIRI is so good, it still feels like magic to me. It also comforts me that the Rust team takes improving unsafe semantics seriously, with the past Unsafe Code Guidelines WG and today's operational semantics team (t-opsem).
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Safety and Soundness in Rust
I think there are some aspects of this rule that are still undecided. See for example:
- https://github.com/rust-lang/unsafe-code-guidelines/issues/8...
- https://github.com/rust-lang/miri/issues/2732
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I wanna be a crab.
C is much better specified than unsafe Rust. Some things are just not worked out yet in Rust. This may sometimes even bite very experienced devs, such as this issue with Box's aliasing semantics, which tripped up the author of left-right.
What are some alternatives?
tuna - :fish: Python profile viewer
tokio - A runtime for writing reliable asynchronous applications with Rust. Provides I/O, networking, scheduling, timers, ...
pygraphviz - Python interface to Graphviz graph drawing package
rust - Empowering everyone to build reliable and efficient software.
GooPyCharts - A Google Charts API for Python, meant to be used as an alternative to matplotlib.
rfcs - RFCs for changes to Rust
Flask JSONDash - :snake: :bar_chart: :chart_with_upwards_trend: Build complex dashboards without any front-end code. Use your own endpoints. JSON config only. Ready to go.
x11rb - X11 bindings for the rust programming language, similar to xcb being the X11 C bindings
VisPy - Main repository for Vispy
bevy - A refreshingly simple data-driven game engine built in Rust
line_profiler - Line-by-line profiling for Python
miri - An interpreter for Rust's mid-level intermediate representation