Ecosyste.ms: Packages

An open API service providing package, version and dependency metadata of many open source software ecosystems and registries.

crates.io "concurrent" keyword

sled-native 0.34.6 💰
a C-compatible API for sled
2 versions - Latest release: over 3 years ago - 953 downloads total - 7,771 stars on GitHub - 1 maintainer
Top 1.5% on crates.io
sled 0.34.7 💰
Lightweight high-performance pure-rust transactional embedded database.
103 versions - Latest release: over 2 years ago - 286 dependent packages - 881 dependent repositories - 4.15 million downloads total - 7,771 stars on GitHub - 1 maintainer
executioner 0.0.1 💰
Async scheduler that supports prioritization, efficient selection, and joining. A distributable M...
1 version - Latest release: about 4 years ago - 552 downloads total - 7,771 stars on GitHub - 1 maintainer
Top 5.3% on crates.io
pagecache 0.19.4 💰
lock-free pagecache and log for high-performance databases
57 versions - Latest release: over 4 years ago - 2 dependent packages - 42 dependent repositories - 87.1 thousand downloads total - 7,771 stars on GitHub - 1 maintainer
index 0.15.4 💰
a flash-sympathetic persistent lock-free B+ tree
1 version - Latest release: about 6 years ago - 1.02 thousand downloads total - 7,771 stars on GitHub - 1 maintainer
Top 5.6% on crates.io
vsdbsled 0.34.7-p1 💰
Lightweight high-performance pure-rust transactional embedded database.
2 versions - Latest release: about 2 years ago - 3 dependent packages - 1 dependent repositories - 19.9 million downloads total - 7,771 stars on GitHub - 3 maintainers
Top 4.9% on crates.io
ndarray-parallel 0.9.1
Parallelization for ndarray using rayon. (Deprecated - use ndarray with rayon directly.)
12 versions - Latest release: over 4 years ago - 11 dependent packages - 11 dependent repositories - 43.3 thousand downloads total - 3,308 stars on GitHub - 2 maintainers
conc 0.5.0
Hazard-pointer-based concurrent memory reclamation.
8 versions - Latest release: almost 7 years ago - 5.27 thousand downloads total - 2,947 stars on GitHub - 3 maintainers
Top 1.6% on crates.io
dashmap 5.5.3
Blazing fast concurrent HashMap for Rust.
77 versions - Latest release: 9 months ago - 687 dependent packages - 5,780 dependent repositories - 57.1 million downloads total - 2,737 stars on GitHub - 1 maintainer
dashmap_with_out_t_map_trait 5.0.0
Blazing fast concurrent HashMap for Rust.
1 version - Latest release: over 2 years ago - 447 downloads total - 2,737 stars on GitHub - 1 maintainer
Top 3.7% on crates.io
moka 0.12.7 💰
A fast and concurrent cache library inspired by Java Caffeine
59 versions - Latest release: 25 days ago - 71 dependent packages - 648 dependent repositories - 5.11 million downloads total - 1,330 stars on GitHub - 1 maintainer
Top 5.4% on crates.io
flurry 0.5.1
Rust port of Java's ConcurrentHashMap
10 versions - Latest release: 23 days ago - 18 dependent packages - 100 dependent repositories - 457 thousand downloads total - 484 stars on GitHub - 1 maintainer
ditto 0.2.0
CRDTs for common data structures like maps, sets, vecs, strings, and JSON
2 versions - Latest release: about 6 years ago - 1 dependent repositories - 2.12 thousand downloads total - 471 stars on GitHub - 1 maintainer
Top 7.6% on crates.io
stretto 0.8.4 💰
Stretto is a high performance thread-safe memory-bound Rust cache.
35 versions - Latest release: 15 days ago - 6 dependent packages - 13 dependent repositories - 152 thousand downloads total - 398 stars on GitHub - 1 maintainer
bagpipe 0.1.0
A concurrent bag datastructure.
1 version - Latest release: over 6 years ago - 1 dependent package - 1.74 thousand downloads total - 292 stars on GitHub - 1 maintainer
Top 3.2% on crates.io
thread_local 1.1.8
Per-object thread-local storage
27 versions - Latest release: 3 months ago - 95 dependent packages - 41,835 dependent repositories - 132 million downloads total - 292 stars on GitHub - 1 maintainer
r3bl_terminal_async 0.5.2 💰
Async non-blocking read_line implemenation with multiline editor, with concurrent display output ...
6 versions - Latest release: 7 days ago - 1.34 thousand downloads total - 288 stars on GitHub - 1 maintainer
r3bl_ansi_color 0.6.9 💰
Rust crate to generate formatted ANSI 256 (8-bit) and truecolor (24-bit) color output to stdout
15 versions - Latest release: 7 months ago - 3 dependent packages - 2 dependent repositories - 193 thousand downloads total - 282 stars on GitHub - 1 maintainer
r3bl_redux 0.2.6 💰
Redux library built using Tokio, concurrent & parallel
12 versions - Latest release: 7 months ago - 2 dependent packages - 1 dependent repositories - 6.45 thousand downloads total - 282 stars on GitHub - 1 maintainer
r3bl_simple_logger 0.1.3 💰
Replacement for the simplelog crate, which is simpler and has clearer dependencies.
4 versions - Latest release: 7 months ago - 1 dependent package - 147 thousand downloads total - 277 stars on GitHub - 1 maintainer
r3bl_rs_utils_macro 0.9.9
Internal support for a proc-macro library for reading attributes into structs when implementing c...
26 versions - Latest release: 27 days ago - 3 dependent packages - 1 dependent repositories - 44.5 thousand downloads total - 266 stars on GitHub - 1 maintainer
r3bl_rs_utils 0.9.15 💰
Misc utility functions for r3bl-open-core repo
83 versions - Latest release: 5 months ago - 1 dependent package - 1 dependent repositories - 26 thousand downloads total - 265 stars on GitHub - 1 maintainer
Top 9.5% on crates.io
scc 2.1.1
High performance containers and utilities for concurrent and asynchronous programming
154 versions - Latest release: 10 days ago - 9 dependent packages - 8 dependent repositories - 455 thousand downloads total - 246 stars on GitHub - 1 maintainer
Top 4.3% on crates.io
sharded-slab 0.1.7 💰
A lock-free concurrent slab.
17 versions - Latest release: 7 months ago - 17 dependent packages - 18,640 dependent repositories - 82 million downloads total - 239 stars on GitHub - 1 maintainer
flashmap 0.1.0
A lock-free eventually consistent concurrent hash map.
6 versions - Latest release: almost 2 years ago - 1 dependent repositories - 11.1 thousand downloads total - 233 stars on GitHub - 1 maintainer
r3bl_rs_utils_core 0.9.13
Helper crate for r3bl_tui and r3bl_tuify crates. Used by workspace in https://crates.io/crates/r3...
34 versions - Latest release: 27 days ago - 6 dependent packages - 1 dependent repositories - 168 thousand downloads total - 232 stars on GitHub - 1 maintainer
r3bl-cmdr 0.0.12
A TUI app suite for developers. Includes a Markdown editor `edi` and a git client `giti`.
12 versions - Latest release: 1 day ago - 3.19 thousand downloads total - 232 stars on GitHub - 1 maintainer
r3bl_tuify 0.1.26
Easily add lightweight TUI capabilities to any CLI apps
26 versions - Latest release: 27 days ago - 158 thousand downloads total - 232 stars on GitHub - 1 maintainer
r3bl_tui 0.5.3
TUI library to build modern apps inspired by Elm, with Flexbox, CSS, editor component, emoji supp...
21 versions - Latest release: 27 days ago - 1 dependent package - 1 dependent repositories - 55.6 thousand downloads total - 232 stars on GitHub - 1 maintainer
async-semaphore 1.2.0
An async semaphore
4 versions - Latest release: over 3 years ago - 1 dependent package - 2 dependent repositories - 101 thousand downloads total - 224 stars on GitHub - 1 maintainer
Top 6.1% on crates.io
deque 0.3.2
A (mostly) lock-free concurrent work-stealing deque
16 versions - Latest release: about 7 years ago - 14 dependent packages - 122 dependent repositories - 543 thousand downloads total - 223 stars on GitHub - 1 maintainer
leapfrog 0.3.0
A fast, lock-free concurrent hash map
7 versions - Latest release: 11 months ago - 1 dependent repositories - 8.9 thousand downloads total - 182 stars on GitHub - 1 maintainer
recloser 1.1.1
A concurrent circuit breaker implemented with ring buffers
6 versions - Latest release: 3 months ago - 317 thousand downloads total - 115 stars on GitHub - 1 maintainer
bustle 0.5.1
Benchmarking harness for concurrent key-value collections
12 versions - Latest release: over 1 year ago - 2 dependent packages - 4 dependent repositories - 5.55 thousand downloads total - 106 stars on GitHub - 1 maintainer
quick_cache 0.5.1
Lightweight and high performance concurrent cache
13 versions - Latest release: about 1 month ago - 7 dependent packages - 3 dependent repositories - 464 thousand downloads total - 104 stars on GitHub - 1 maintainer
boxcar 0.2.5
A concurrent, append-only vector
7 versions - Latest release: 13 days ago - 4 dependent packages - 1 dependent repositories - 19.6 thousand downloads total - 101 stars on GitHub - 1 maintainer
blink-alloc 0.3.1
Fast, concurrent, arena-based allocator with drop support
11 versions - Latest release: 9 months ago - 1 dependent package - 1 dependent repositories - 10.1 thousand downloads total - 94 stars on GitHub - 1 maintainer
congee 0.2.18
A Rust implementation of ART-OLC concurrent adaptive radix tree.
16 versions - Latest release: over 1 year ago - 10.7 thousand downloads total - 79 stars on GitHub - 1 maintainer
mini-moka 0.10.3 💰
A lighter edition of Moka, a fast and concurrent cache library
5 versions - Latest release: 4 months ago - 4 dependent packages - 11 dependent repositories - 508 thousand downloads total - 75 stars on GitHub - 1 maintainer
con-art-rust 0.2.0
A Rust implementation of ART-OLC concurrent adaptive radix tree.
10 versions - Latest release: about 2 years ago - 3.04 thousand downloads total - 75 stars on GitHub - 1 maintainer
dagrs 0.2.0
The DAG engine, named dagrs, is designed to execute multiple tasks with graph-like dependencies. ...
2 versions - Latest release: 10 months ago - 1 dependent package - 661 downloads total - 72 stars on GitHub - 1 maintainer
possum-db 0.2.3 💰
concurrent disk-backed cache supporting efficient direct file I/O, transactions, and snapshots us...
7 versions - Latest release: 2 months ago - 2.32 thousand downloads total - 66 stars on GitHub - 1 maintainer
flize 4.2.3
non global, configurable and fast concurrent resource reclamation
21 versions - Latest release: over 3 years ago - 7.44 thousand downloads total - 65 stars on GitHub - 1 maintainer
faster_kvs 0.1.0
Rust wrapper for FASTER by Microsoft Research
1 version - Latest release: about 5 years ago - 664 downloads total - 54 stars on GitHub - 1 maintainer
faster-rs 0.11.0
Rust wrapper for FASTER by Microsoft Research
20 versions - Latest release: over 3 years ago - 1 dependent repositories - 9.44 thousand downloads total - 54 stars on GitHub - 2 maintainers
cache-advisor 1.0.16
scan-resistant concurrent cache eviction manager
9 versions - Latest release: 9 months ago - 2 dependent packages - 1 dependent repositories - 12 thousand downloads total - 51 stars on GitHub - 1 maintainer
berghain 0.0.1-preview
the hottest cache with an admisison policy based on TinyLFU
1 version - Latest release: over 4 years ago - 539 downloads total - 51 stars on GitHub - 1 maintainer
coroutines 0.2.0
High performance coroutine library with native experience
4 versions - Latest release: about 6 years ago - 1 dependent repositories - 2.83 thousand downloads total - 51 stars on GitHub - 1 maintainer
contrie 0.1.4
Concurrent map and set
5 versions - Latest release: almost 5 years ago - 1 dependent package - 3 dependent repositories - 13.1 thousand downloads total - 49 stars on GitHub - 1 maintainer
rusty_pool 0.7.0
Self growing / shrinking `ThreadPool` implementation based on crossbeam's multi-producer multi-co...
13 versions - Latest release: about 2 years ago - 13 dependent packages - 22 dependent repositories - 610 thousand downloads total - 38 stars on GitHub - 1 maintainer
bztree 0.2.0
BzTree implementation for Rust
2 versions - Latest release: over 1 year ago - 2 dependent repositories - 3.43 thousand downloads total - 33 stars on GitHub - 1 maintainer
rsdb 0.12.1 💰
a flash-sympathetic persistent lock-free B+ tree, pagecache, and log
23 versions - Latest release: over 6 years ago - 1 dependent package - 1 dependent repositories - 14.9 thousand downloads total - 31 stars on GitHub - 1 maintainer
sharded 0.2.1
Safe, fast, and obvious concurrent collections
9 versions - Latest release: almost 2 years ago - 1 dependent package - 2 dependent repositories - 5.11 thousand downloads total - 30 stars on GitHub - 1 maintainer
hazptr 0.1.1
hazard pointer based concurrent memory reclamation
2 versions - Latest release: almost 5 years ago - 1.13 thousand downloads total - 29 stars on GitHub - 1 maintainer
plru 0.1.1
Implementation of concurrent (lockless) pseudo-LRU cache replacement policy.
2 versions - Latest release: almost 7 years ago - 1.85 thousand downloads total - 24 stars on GitHub - 1 maintainer
tokio-pool
TokioPool is a library designed to help you multithread your tokio applications by providing a po...
1 version - Latest release: 24 days ago - 1 dependent repositories - 2.12 thousand downloads total - 23 stars on GitHub - 1 maintainer
concurrent_lru 0.2.0
A concurrent LRU cache
2 versions - Latest release: about 3 years ago - 2 dependent packages - 4 dependent repositories - 133 thousand downloads total - 22 stars on GitHub - 1 maintainer
lockfreehashmap 0.1.2
A concurrent, lock-free hash map.
3 versions - Latest release: about 6 years ago - 1 dependent package - 1 dependent repositories - 2.75 thousand downloads total - 22 stars on GitHub - 1 maintainer
single_value_channel 1.2.2
Concurrent single-value update and receive channel
5 versions - Latest release: about 3 years ago - 4 dependent packages - 11 dependent repositories - 17.9 thousand downloads total - 21 stars on GitHub - 1 maintainer
rc_event_queue 0.4.2
VecDeque-like fast, unbounded, FIFO, concurent read-lock-free message queue.
8 versions - Latest release: over 2 years ago - 1 dependent package - 1 dependent repositories - 6.06 thousand downloads total - 20 stars on GitHub - 1 maintainer
rsgc 1.1.0
Concurrent GC library for Rust
2 versions - Latest release: 10 months ago - 575 downloads total - 17 stars on GitHub - 1 maintainer
concurrent-hash-map 0.0.6
This is a simple concurrent hash map written in Rust. It uses a design where read operations neve...
6 versions - Latest release: over 7 years ago - 5.92 thousand downloads total - 17 stars on GitHub - 1 maintainer
moka-cht 0.5.0
Lock-free resizeable concurrent hash table
2 versions - Latest release: almost 3 years ago - 1 dependent package - 28 dependent repositories - 80.6 thousand downloads total - 17 stars on GitHub - 1 maintainer
bplustree 0.1.0
Concurrent in-memory B+ Tree featuring optimistic lock coupling
1 version - Latest release: over 2 years ago - 2.99 thousand downloads total - 16 stars on GitHub - 1 maintainer
ppipe 0.2.0
An elegantly simple and lightweight library for making iterator pipelines concurrent and blazingl...
2 versions - Latest release: over 7 years ago - 1.83 thousand downloads total - 15 stars on GitHub - 1 maintainer
actix-web-tonic 1.0.0 💰
actix-web and tonic concurrent runner
1 version - Latest release: about 2 years ago - 881 downloads total - 11 stars on GitHub - 1 maintainer
rustupolis 0.0.2
An implementation of the tuple space data structure in Rust.
1 version - Latest release: over 3 years ago - 1 dependent package - 1 dependent repositories - 1.05 thousand downloads total - 10 stars on GitHub - 1 maintainer
conqueue 0.4.0
Yet another multi-producer, single-consumer queue (MPSC)
6 versions - Latest release: over 3 years ago - 1 dependent package - 22 dependent repositories - 156 thousand downloads total - 9 stars on GitHub - 2 maintainers
pipelines 0.4.0
A tool for constructing multi-threaded pipelines of execution
2 versions - Latest release: about 6 years ago - 1.84 thousand downloads total - 9 stars on GitHub - 1 maintainer
lfchring 0.1.3
Concurrent, lock-free implementation of a consistent hashing ring data structure, supporting virt...
4 versions - Latest release: about 3 years ago - 1.42 thousand downloads total - 9 stars on GitHub - 1 maintainer
thunk 0.3.0
Primitives for generic lazy evaluation in Rust. This crate requires nightly for `untagged_unions`.
6 versions - Latest release: almost 7 years ago - 4.19 thousand downloads total - 8 stars on GitHub - 1 maintainer
nonparallel 0.1.1
Rust macro for ensuring non-parallel execution of functions. (Deprecated, use `serial_test` inste...
2 versions - Latest release: 10 months ago - 1 dependent repositories - 972 downloads total - 8 stars on GitHub - 1 maintainer
cmap 0.3.0
Concurrent multi-writer hash-map using trie
3 versions - Latest release: over 2 years ago - 1 dependent repositories - 1.23 thousand downloads total - 7 stars on GitHub - 1 maintainer
runcc 2.0.3
run commands concurrently with rust and cargo
7 versions - Latest release: over 1 year ago - 2.59 thousand downloads total - 7 stars on GitHub - 1 maintainer
benjamin_batchly 0.1.1
Low latency batching tool. Bundle lots of single concurrent operations into sequential batches of...
2 versions - Latest release: almost 2 years ago - 1.26 thousand downloads total - 6 stars on GitHub - 1 maintainer
streamcatcher 1.0.1
A thread-safe, shared (asynchronous), almost-lockless stream buffer.
5 versions - Latest release: over 2 years ago - 1 dependent package - 85 dependent repositories - 100 thousand downloads total - 6 stars on GitHub - 1 maintainer
ppar 0.3.1
Persistent immutable array
4 versions - Latest release: over 2 years ago - 1.55 thousand downloads total - 5 stars on GitHub - 1 maintainer
busan 0.2.1
An actor implementation for Rust
6 versions - Latest release: about 1 year ago - 1.64 thousand downloads total - 5 stars on GitHub - 1 maintainer
colosseum 0.2.2
A variety of arena allocators for Rust, including thread-safe arenas.
5 versions - Latest release: over 6 years ago - 5 dependent packages - 17 dependent repositories - 200 thousand downloads total - 5 stars on GitHub - 1 maintainer
secc 0.0.10
Implements a Skip-Enabled Concurrent Channel (SECC) for Rust
6 versions - Latest release: over 4 years ago - 2 dependent packages - 3 dependent repositories - 5.42 thousand downloads total - 5 stars on GitHub - 1 maintainer
lib-wc 0.2.0
Will's Programming Toolbox
15 versions - Latest release: about 1 year ago - 3.76 thousand downloads total - 4 stars on GitHub - 1 maintainer
stuck 0.4.0
Multi-threading scheduled task facility building on cooperative stackful coroutine
12 versions - Latest release: 7 days ago - 3.38 thousand downloads total - 4 stars on GitHub - 1 maintainer
semalock 0.3.1
A library for concurrently writing to files in a safe and efficient manner.
5 versions - Latest release: about 4 years ago - 4 dependent repositories - 7.22 thousand downloads total - 3 stars on GitHub - 2 maintainers
debra 0.0.0
distributed epoch-based reclamation
1 version - Latest release: almost 5 years ago - 631 downloads total - 3 stars on GitHub - 1 maintainer
object-space 0.1.1
An object store library for highly concurrent program written in Rust.
2 versions - Latest release: almost 6 years ago - 1.49 thousand downloads total - 3 stars on GitHub - 1 maintainer
scherben-map 0.1.10
Concurrent Sharded HashMap for Rust
9 versions - Latest release: about 1 year ago - 2.29 thousand downloads total - 3 stars on GitHub - 1 maintainer
waker-queue 0.1.0
A queue with a waker attached. Low level plumbing.
1 version - Latest release: almost 4 years ago - 1 dependent package - 2 dependent repositories - 3.15 thousand downloads total - 3 stars on GitHub - 1 maintainer
conquer-util 0.3.0
utilities for concurrent and lock-free programming
3 versions - Latest release: over 3 years ago - 1 dependent package - 146 dependent repositories - 362 thousand downloads total - 3 stars on GitHub - 1 maintainer
thread-manager 1.0.0
A streamlined Rust library for efficient thread pooling and parallel job execution, designed for ...
27 versions - Latest release: 3 months ago - 6.77 thousand downloads total - 3 stars on GitHub - 1 maintainer
taskqueue 0.1.1
Parallel execution of the task queue with the ability to add new tasks inside the running tasks
2 versions - Latest release: almost 3 years ago - 787 downloads total - 3 stars on GitHub - 1 maintainer
shared-expiry-get 0.2.0
Simple concurrent async get with expiration for Rust
3 versions - Latest release: over 3 years ago - 5 dependent repositories - 5.26 thousand downloads total - 2 stars on GitHub - 1 maintainer
cc-queue 0.0.1
Fatourou and Kallimanis's CC Queue, ccqueue, an unbounded, concurrent blocking queue faster than ...
2 versions - Latest release: over 6 years ago - 1.29 thousand downloads total - 2 stars on GitHub - 1 maintainer
testbench 1.0.0
Testing and benchmarking tools for concurrent Rust code
17 versions - Latest release: over 1 year ago - 3 dependent packages - 2 dependent repositories - 35.2 thousand downloads total - 2 stars on GitHub - 1 maintainer
pausable_clock 1.0.1
A source of time information that can be paused and resumed
7 versions - Latest release: almost 3 years ago - 2 dependent packages - 1 dependent repositories - 4.09 thousand downloads total - 2 stars on GitHub - 1 maintainer
reclaim 0.2.2
trait-based abstract interface for memory reclamation
4 versions - Latest release: almost 5 years ago - 2 dependent packages - 1 dependent repositories - 3.77 thousand downloads total - 2 stars on GitHub - 1 maintainer
everygarf 2.6.1
Concurrently download every Garfield comic to date
6 versions - Latest release: about 1 month ago - 1.57 thousand downloads total - 1 stars on GitHub - 1 maintainer
ring-alloc 0.2.0
Specialized allocator for short-living objects
3 versions - Latest release: 12 months ago - 781 downloads total - 1 stars on GitHub - 1 maintainer
tucan 0.1.5
A simple, fast, and multithreaded interner with loose type requirement.
6 versions - Latest release: about 1 year ago - 1.51 thousand downloads total - 1 stars on GitHub - 1 maintainer
concurrent_prime_sieve 0.3.3
Tools for generating filters and collections with primes concurrently. Rust implementation of the...
11 versions - Latest release: about 7 years ago - 1 dependent repositories - 8.43 thousand downloads total - 1 stars on GitHub - 1 maintainer
storage-map 0.3.0
Concurrent append-only map storage
5 versions - Latest release: over 3 years ago - 1 dependent package - 678 dependent repositories - 571 thousand downloads total - 1 stars on GitHub - 1 maintainer
Related Keywords
rust 45 lock-free 29 parallel 25 hashmap 22 async 19 map 15 cache 13 database 12 concurrency 12 atomic 11 lock 11 cli 11 vte 10 tuify 10 tui 10 windows 10 terminal 10 syntax-highlighting 10 cli-app 10 command-line 10 console 10 editor 10 hacktoberfest 10 linux 10 macos 10 productivity 10 tree 9 embedded 8 concurrent-data-structure 8 high-performance 8 b-tree 7 persistence 7 fuzzing 7 sled 6 caching 6 thread 6 orm 6 log-structured 6 kv 6 incredibly-spicy 6 formal-methods 6 embedded-kv 6 crash-testing 6 b-plus-tree 6 data-structure 6 channel 5 queue 5 testing 5 data-structures 5 persistent 5 reclamation 4 event 4 macro 4 lockless 4 allocator 4 pool 4 tokio 4 list 3 sync 3 tuple-space 3 lru 3 concurrent-hashmap 3 pipeline 3 sqlite 3 memory 3 epoch 3 futures 3 distributed 3 parking_lot 3 containers 3 coroutine 3 concurrent-programming 3 lfu 3 rust-lang 3 concurrent-map 3 set 3 vector 2 arena 2 index 2 adaptive-radix-tree 2 range-index 2 synchronization 2 no-std 2 thread_local 2 art 2 task 2 fast 2 key-value-store 2 server 2 threadpool 2 alloc 2 sharded 2 hash 2 blocking 2 mpmc 2 multithreading 2 mutex 2 benchmarking 2 algorithms 2 actor 2