u/no-bugs — reddlx

MECHLOVE Blueprint - 1/7. General: Pretty Much Classical RDBMS at Heart, with Each and Every Component Redesigned

We are writing yet another RDBMS, and would appreciate any feedback on our blueprints; while the RDBMS is classical at heart (with WAL and data pages and fuzzy checkpoints), each and every component underneath was redesigned - from WAL being non-ARIES and ZFS-style on-disk CoW to in-memory CoW and cache- and SIMD-friendly page layouts. Our philosophy is playing alongside modern hardware instead of fighting it, MECHLOVE being the highest form of Mechanical Sympathy. As a result, we hope it will beat Hekaton (while being mostly open-source except for certain enterprise features such as HA and at-rest encryption).

Please feel free to comment.

6it.dev

u/no-bugs — 13 days ago

▲ 188 r/cpp+1 crossposts

Efficient C++ Programming for Modern 64-bit CPUs, Chapter 4/part 2

Here comes the 2nd installment of (VERY DRAFT) Chapters from my (and Dmytro Ivanchykhin's) upcoming book, "Efficient C++ Programming for Modern 64-bit CPUs". Comments are extremely welcome (as before, we're committed to fixing all the issues highlighted in comments).

Second part of Chapter 4 (the one on CPU Physics and CPU Cycles): https://6it.dev/blog/infographics-operation-costs-in-cpu-clock-cycles-take-2-80736 . In addition to some interesting data (in particular, micro-research on the progress of MUL/DIV ops since 2017), it has that visualization of the different times quite a few ppl here have asked for.

DISCLAIMERS:

- it is VERY DRAFT (editing is coming)

- this is not a book on optimizations (though some techniques will be covered in Appendices A and B in Vol. 2) - this is a book on de-pessimizations; for optimizations - please refer to the excellent book by Denis Bakhvalov (though we're sure that de-pessimizations should be seen as a prerequisite for optimizations 😉).

u/no-bugs — 4 months ago

▲ 97 r/cpp

Efficient C++ Programming on Modern 64-bit CPUs, part 1 of Chapter 4

Well, I'm starting to publish (VERY DRAFT) Chapters from my (and Dmytro Ivanchykhin's) upcoming book, "Efficient C++ Programming for Modern 64-bit CPUs". Comments are extremely welcome (as before, we're committed to fixing all the issues highlighted in comments).

The first installment is the first part of Chapter 4: https://6it.dev/blog/on-cpu-physics-and-cpu-cycles-80730

In Vol. 1, the most interesting will probably be Chapter 9, with about 200 (sic!) practical de-pessimization hints.

Beware: this is not a book on optimizations (though some techniques will be covered in Appendixes A and B in Vol. 2) - this is a book on de-pessimizations; for optimizations - please refer to the excellent book by Denis Bakhvalov (though we're sure that de-pessimizations should be seen as a prerequisite for optimizations 😉).

Bracing for impact...

reddit.com

u/no-bugs — 4 months ago