EmbeddingGemma 2: an open, lightweight multimodal embedding model
deepmind.google·6d ago
AI Engineering
Lobsters·Aug 16·5 min read
A faster way to calculate the day-of-the-week
TL;DR
New fast functions for calculating the day-of-the-week from a day-count have been developed, achieving impressive performance with minimal latency. These functions can compute weekdays in ISO format using optimized instructions without speed penalties.
✦ Why It Matters
Implement these optimized functions to enhance date calculations in your applications today.
Key Takeaways
- Utilize new algorithms for faster weekday calculations.
- Implement bit manipulation techniques for performance gains.
- Consider platform-specific optimizations for ARM and x86.
- Explore the Function Explorer for ready-to-use code examples.
How It Works
The algorithms leverage Mersenne numbers to simplify modulus operations, allowing for quick calculations. By using a specific multiplier and constants, the weekday can be computed with minimal operations, often just a multiplication and a right shift.
This approach reduces the complexity typically associated with division, making it suitable for high-performance applications.