Issues

• Tree Borrow violation in par_merge

  rayon-rs/rayon#1319 · Filter by author zhouxt1 opened on Sep 16, 2026
  3

• Transpose HashMap<K, Vec<T>> to Vec<HashMap<K, T>>

  rayon-rs/rayon#1304 · Filter by author krakow10 opened on Jun 19, 2026
  1

• Is it normal that changing the execution order makes 10x faster code?

  rayon-rs/rayon#1279 · Filter by author Neutron3529 opened on Jan 14, 2026
  2

• API to avoid heap-allocating tasks in Scope::spawn

  rayon-rs/rayon#1277 · Filter by author davidlattimore opened on Nov 27, 2025
  6

• Idea: Customize the parallelization backend by accepting a generic join() function

  rayon-rs/rayon#1271 · Filter by author FeanorTheElf opened on Oct 6, 2025

• panic_fuse does not terminate when one thread panics

  rayon-rs/rayon#1270 · Filter by author scullionw opened on Oct 2, 2025
  6

• Poor interaction with channels

  rayon-rs/rayon#1269 · Filter by author sftse opened on Sep 27, 2025
  6

• Implement a median / select nth algorithm.

  rayon-rs/rayon#1254 · Filter by author GuillaumeDIDIER opened on Jul 7, 2025
  3

• Issue using RefCell with nested rayon threads

  rayon-rs/rayon#1253 · Filter by author jdmarsh opened on Jun 25, 2025
  3

• Join handles for spawned tasks

  enhancement
  rayon-rs/rayon#1252 · Filter by author zopsicle opened on Jun 12, 2025
  1

• Order-preserving par_bridge and trait

  rayon-rs/rayon#1250 · Filter by author lu-zero opened on Jun 5, 2025

• Proposals concerning thread pool termination problems

  rayon-rs/rayon#1242 · Filter by author patengel opened on Apr 9, 2025
  2

• Would you accept a PR to optionally switch parallelism library to chili?

  rayon-rs/rayon#1235 · Filter by author kdy1 opened on Mar 26, 2025
  13

• Updating sort algorithms

  help wanted
  rayon-rs/rayon#1233 · Filter by author nazar-pc opened on Feb 16, 2025
  5

• Implementing a parallel version of array::from_fn()

  rayon-rs/rayon#1222 · Filter by author CrabbyDisk opened on Dec 30, 2024
  4

• Rayon does not work well with the optick profiling and performance logging library

  rayon-rs/rayon#1221 · Filter by author vladkvit opened on Dec 23, 2024
  1

• Consider a tunable to increase work splitting in parallel iterators

  rayon-rs/rayon#1217 · Filter by author HadrienG2 opened on Dec 12, 2024

• init function in .map_init called unexpectedly many times.

  rayon-rs/rayon#1214 · Filter by author Neutron3529 opened on Dec 3, 2024
  3

• ThreadSanitizer: data race in _$LT$std..sys_common..lazy_box..LazyBox$LT$T$GT$$u20$as$u20$core..ops..drop..Drop$GT$::drop::hfc9babc43b28f06f+0x20

  rayon-rs/rayon#1212 · Filter by author ksolana opened on Nov 18, 2024
  1

• Inefficient scheduling for par_iter

  rayon-rs/rayon#1204 · Filter by author morgante opened on Oct 21, 2024
  3

• Is it possible to spawn task to be executed in specific thread?

  rayon-rs/rayon#1199 · Filter by author AngelicosPhosphoros opened on Oct 8, 2024
  4

• Switching par_iter makes memory usage explode (40x)

  rayon-rs/rayon#1189 · Filter by author BloodStainedCrow opened on Aug 16, 2024
  36

• Comparison with Spice

  rayon-rs/rayon#1188 · Filter by author mo8it opened on Aug 12, 2024
  5

• help: How to implement memoized chunks for parallel iterator?

  rayon-rs/rayon#1186 · Filter by author erhant opened on Jul 29, 2024
  2

• the method par_iter exists for struct ChunkByMut<'_, BinF32, {closure@histogram.rs:207:78}>, but its trait bounds were not satisfied

  rayon-rs/rayon#1184 · Filter by author deadsoul44 opened on Jul 28, 2024
  5