orlp

Follow

⚠️

This user's social credit score is unknown.

Orson Peters orlp

⚠️

This user's social credit score is unknown.

Follow

711 followers · 7 following

Polars
Leiden, Netherlands
https://orlp.net/blog/

Achievements

Achievements

Popular repositories Loading

pdqsort Public

Pattern-defeating quicksort.

C++ 2.4k 101
glidesort Public

A Rust implementation of Glidesort, my stable adaptive quicksort/mergesort hybrid sorting algorithm.

Rust 1.6k 25
slotmap Public

Slotmap data structure for Rust

Rust 1.2k 77
ed25519 Public

Portable C implementation of Ed25519, a high-speed high-security public-key signature system.

C 516 165
polymur-hash Public

The PolymurHash universal hash function.

C 346 7
foldhash Public

A fast, non-cryptographic, minimally DoS-resistant hashing algorithm for Rust.

Rust 235 9

888 contributions in the last year

Learn how we count contributions

Less

More

Activity overview

Contributed to pola-rs/polars, orlp/foldhash, rust-lang/rust and 41 other repositories

Contribution activity

March 2025

Created 69 commits in 3 repositories

Created a pull request in pola-rs/polars that received 8 comments

perf: Remove unnecessary black_boxes in Kahan summation

@ritchie46 Just happened to spot these, the Rust compiler can't optimize Kahan summation out even without the black box, that would be semantics-ch…

+3 −9 lines changed • 8 comments

Opened 52 other pull requests in 2 repositories

pola-rs/polars 44 merged

fix: Deadlock in new-streaming multiplexer
This contribution was made on Mar 28
perf: Lower is_in to bitmap-output semi-join in new streaming engine
This contribution was made on Mar 27
perf: Add native semi/anti join in new streaming engine
This contribution was made on Mar 26
fix: Panic in new RegexCache
This contribution was made on Mar 26
perf: Cache regex compilation globally
This contribution was made on Mar 26
chore: Add POLARS_TIMEOUT_MS for timing out slow Polars tests
This contribution was made on Mar 21
chore: Disable --dist loadgroup in pytest
This contribution was made on Mar 21
chore: Fix refcount assert being messed up by pytest assertion magic
This contribution was made on Mar 21
perf: Avoid rechunking in gather
This contribution was made on Mar 20
fix: Null panic on decimal aggregate
This contribution was made on Mar 20
perf: Use views for binary hash tables and add single-key binary variant
This contribution was made on Mar 20
perf: Put THP behind feature flag
This contribution was made on Mar 19
perf: Switch ahash for foldhash
This contribution was made on Mar 19
perf: Enable THP by default
This contribution was made on Mar 18
fix: Incorrect quote check in CSV parser
This contribution was made on Mar 18
fix: Join with categoricals on new-streaming engine
This contribution was made on Mar 18
perf: Improve join performance for expanding joins
This contribution was made on Mar 18
refactor: Add env vars to configure new-streaming buffer sizes
This contribution was made on Mar 18
fix: Memory leaks in SharedStorage
This contribution was made on Mar 17
refactor(rust): Pass around StreamingExecutionState, containing num_pipelines and ExecutionState
This contribution was made on Mar 17
perf: Implement linear-time rolling_min/max
This contribution was made on Mar 15
refactor(rust): Add allocation-free empty/default to SharedStorage
This contribution was made on Mar 15
perf: Improve InputIndependentSelect by delegating to InMemorySourceNode
This contribution was made on Mar 15
fix: Clear NaNs due to zero-weight division in rolling var/std
This contribution was made on Mar 14
chore: Remove variance numerical stability hack
This contribution was made on Mar 14
Some pull requests not shown.

orlp/foldhash 8 merged

Version 0.1.5.
This contribution was made on Mar 15
Fix clippy warning.
This contribution was made on Mar 15
Add SharedSeed and SeedableRandomState.
This contribution was made on Mar 15
Perform smarter selection for 32-bit rotation.
This contribution was made on Mar 15
Lower MSRV to 1.60.
This contribution was made on Mar 15
Improve mixing on 32-bit.
This contribution was made on Mar 15
Fix length-extension attack due to overlapping reads.
This contribution was made on Mar 8
Fix per-hasher-random seed-independence for some string collisions.
This contribution was made on Mar 8

Reviewed 7 pull requests in 2 repositories

pola-rs/polars 6 pull requests

feat: Replace thread unsafe GilOnceCell with Mutex
This contribution was made on Mar 26
refactor(rust): Add MorselLinearizer convenience wrapper
This contribution was made on Mar 18
feat: Allow to use repeat_by with (nested) lists and structs
This contribution was made on Mar 16
perf: Allow elementwise functions in recursive lowering
This contribution was made on Mar 14
fix: Variance can never be negative
This contribution was made on Mar 10
fix: IPC round-trip of list of empty view with non-empty bufferset
This contribution was made on Mar 10

orlp/foldhash 1 pull request

Use 128-bit Widening Multiply on More Platforms
This contribution was made on Mar 15

Created an issue in pola-rs/polars that received 6 comments

Add cast from pl.List(pl.UInt8) to pl.Binary

Description This is a lossless unambiguous conversion so I think we should support it.

6 comments

Opened 15 other issues in 10 repositories

pola-rs/polars 3 open

Add optional columns argument to DataFrame.pivot, and add LazyFrame.pivot with this argument mandatory
This contribution was made on Mar 22
Rolling_min/max incorrectly propagate NaNs, and no non-propagating option is available
This contribution was made on Mar 15
Missed optimization: transform multi-attribute equality joins into filter + single-attribute join
This contribution was made on Mar 12

orlp/foldhash 1 open 2 closed

Remove Copy derive from all random/fixed states
This contribution was made on Mar 19
Length-extension attack on string hash
This contribution was made on Mar 8
FixedState::with_seed doesn't always change collision pattern for strings
This contribution was made on Mar 8

rust-lang/rust 2 open

core::ptr::replace implementation is unsound since Rust 1.80
This contribution was made on Mar 11
CI request: forbid @mentions in commit messages/descriptions
This contribution was made on Mar 4

vscode-neovim/vscode-neovim 1 open

bug: C-d/C-u drops visual line mode
This contribution was made on Mar 26

milkey-mouse/edit 1 open

Allow disabling of 'generic file openers'
This contribution was made on Mar 26

sharkdp/fd 1 open

--exec-batch does not mention it should be last
This contribution was made on Mar 23

rust-lang/hashbrown 1 open

Bucket-based API for HashTable
This contribution was made on Mar 22

pytest-dev/pytest-xdist 1 open

If a node is terminated improperly the registered_collections is not initialized for the node replacing it when using --dist loadgroup
This contribution was made on Mar 21

jemalloc/jemalloc 1 open

Allow suppression of unsupported warnings
This contribution was made on Mar 17

crate-ci/typos 1 closed

extend-include filter is not 'base directory aware' when ran from another directory
This contribution was made on Mar 10