Rust meetup delhi nov 18
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Rust meetup at Delhi on Nov 18. Rust basics, and performance improvements when coupled with Python.
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Rust meetup delhi nov 18
- 1. Let’s Get Rusty License: CC BY-SA 4.0 International. You are free to share and adapt. Nov 23, 2018 | Rust Community Meet-up 2018 | Delhi NCR Abhiram Ravikumar | Mozilla Tech Speaker | ML Research Fellow, SAP Labs India @abhi12ravi
- 2. Hi there! Abhiram Ravikumar • Mozilla Tech Speaker • Open Source Evangelist • Data Science Research Fellow • Lynda Instructor • Software Developer, SAP Labs India Questions / Feedback - @abhi12ravi
- 3. Agenda • Why Rust? • Rust features – (what have you?) • FFIs (Foreign Function Interfaces) demo • Rust Uses and Applications @abhi12ravi
- 4. The audience - Orgs @abhi12ravi
- 5. The audience – Rust knowledge @abhi12ravi
- 6. The audience – rusty-projects @abhi12ravi
- 7. Prelude: C++ Problems • Dangling pointer • Segmentation fault • Iterator invalidation • Thread safety int* abc() { int x = 1; return &x; } @abhi12ravi
- 8. Prelude: C++ Problems • Dangling pointer • Segmentation fault • Iterator invalidation • Thread safety int* abc() { int x = 1; return &x; } @abhi12ravi
- 10. Systems level Memory safe Thread safe Fast ⚡ OOPS Strong Compiler FFIs No GC!
- 11. Memory management – The Good Stuff • Concept of mutability • Ownership & Borrowing
- 12. Concept of mutability – the why • Variables are immutable by default • Add keyword mut to make it mutable • Future readers know the value is going to change • Less prone to unwanted changes in the variable’s value fn main() { let mut x = 5; println!(“X is {}“, x); x = 6; println!(“X is {}“, x); } // X is 5 // X is 6
- 13. Memory allocation - Fundamentals 1. The memory must be requested from the operating system at runtime. 2. We need to return this memory to the operating system when we’re done with our usage.
- 14. Returning memory to the OS Other programming languages: • Garbage Collector (GC) • W/o GC – programmer’s responsibility Challenges: • Need to pair exactly one allocate with exactly one free
- 15. In Rust { let s = String::from("hello"); // s is valid from this point forward // do stuff with s } // this scope is now over, and s is no longer valid Memory is automatically returned once variable goes out of scope.
- 16. Also, in other news…
- 17. This week in Rust… News & Blog Posts The relative performance of C and Rust Quote of the Week Bare Metal Attracts Rust - Sven Gregori on Hackaday
- 18. Enough Rust, let’s switch to Python!
- 19. Python Python • Strong Ecosystem • Fast iterations • Robust interpreter • Powerful meta programming (APIs) • Library support - fantastic • Really slow • Performance issues • Far from metal • Poor multi-threading support
- 20. Rust Python • Speed – fast ⚡ • Compile time ⬇️ • Stable environment (Reliability) • Crash handling functionality ✔️ • Closer to metal • Really slow • Performance issues • Far from the metal • Poor multi-threading support
- 23. Sample Problem Statement String Processing use-case • Count the pairs of repeated characters in the given string • How many subsequent-repeated groups of chars are in the given string?
- 25. Performance Benchmark Scenario pure_python python_with_rus t Observation Mean (ms) 53.9732 2.6085 ~ 20x faster Max (ms) 56.9428 2.9296 ~19x faster
- 26. “Innovation is a necessity now, and the faster your programs run, the faster you innovate!” Abhiram Ravikumar
- 27. References 1. The Rust book 2. Rust Python Example by Rocha C Bruno 3. Armin Ronacher: A Python and Rust love story 4. Dan Callahan - My Python's a little Rust-y - PyCon 2015 5. Extending Python with Rust (Samuel Cormier-Iijima) 6. All you need to know about FFI
- 28. Thank you! This slide deck is available here: speakerdeck.com/abhi12ravi