Num cpus is used at run time in 5,341 crates (of which 656 optionally, 411 directly). It's used at build time in 97 crates (of which 13 optionally, 15 directly). It's used only as a dev dependency in 1,019 crates (25 directly).

Number of dependersNum cpus versionDownloads/month
6,315 1.12.0 301K
2 1.11.1 32K
3 1.10.1 71K
1 1.7.0 2.0K
2 1.0.0 7
134 0.2.13 2.3K
Depender (with downloads and own rev deps) Num cpus version
691K 1635 tokio optional ^1.8.0
627K 22 ryu dev ^1.8
538K 1484 hyper dev ^1.0
431K 34 tokio-reactor ^1.8.0
424K 27 tokio-threadpool ^1.2
372K 273 crossbeam-channel dev ^1.10.0
344K 5 rayon-core ^1.2
342K 18 arc-swap dev ~1
288K 97 futures-cpupool ^1.0
153K 36 futures-executor optional ^1.8.0
149K 9 jobserver dev ^1.0
135K 107 threadpool ^1.6
83K 375 tokio-core dev ^1.0
78K 14 futures-executor-preview optional ^1.0
70K 78 rusttype optional ^1.0
63K 13 actix-server ^1.11
61K 9 actix-threadpool ^1.10
43K 4 rustc-rayon-core ^1.2
34K 227 async-std optional ^1.11.1
22K 19 gimli dev ^1
21K 135 rocket ^1.0
20K 24 dashmap ^1.11.1
17K 62 cargo ^1.0
16K 3 actix-net ^1.0
15K 1 tokio-io-pool ^1.8
15K 143 iron ^1.0
14K 6 rustc-ap-rustc_session ^1.0
11K 1 kvdb-rocksdb ^1.10.1
8.8K 17 rouille ^1
6.2K 15 core_affinity ^1.6.2
4.7K 7 romio ^1.10.0
3.8K 1 juliex ^1.9.0
3.3K ripgrep ^1.8.0
3.1K grcov ^1.12
3.1K 16 gotham ^1.8
3.0K 2 sass-sys build ^1.9.0
2.7K 12 tantivy ^1.2
2.5K sccache ^1.0
2.1K quaint ^1.11
2.0K 4 jwalk dev ^1.12
1.8K 5 bellperson optional ^1
1.7K 5 inferno optional ^1.10
1.7K 4 psutil optional ^1.11.1
1.6K 29 fibers ^1
1.6K 13 fibers_global ^1
1.5K 1 uvth ^1.10.1
1.5K exa ^1.10.0
1.3K 7 ndarray-parallel dev ^1.2
1.3K fd-find ^1.8
1.2K 12 tree_magic optional ^1
1.2K 3 argonautica ^1.10
1.2K 1 criterion-stats ^1
1.1K tin-summer ^1.10.0
1.0K 1 ccl ^1.10.1
950 xsv ^1.4
900 12 bus ^1.6.2
900 ff-find ^1
850 1 texture-synthesis ^1.12.0
800 2 bastion-executor ^1.10
750 dua-cli ^1.10.0
700 rusty-tags ^1.10.0
700 1 cargo-deadlinks ^1.8
700 5 ffmpeg-sys build ^1.0
650 23 solana-runtime ^1.0.0
650 du-dust ^1.12
600 solana-keygen ^1.12.0
600 5 solana-rayon-threadlimit ^1.0.0
600 1 checksums ^1.4
500 sniffglue ^1.6
500 2 dbui-templates ^1.11.1
500 2 fastobo optional ^1.12.0
490 1 tasque ^1
490 1 iota-lib-rs ^1.10
490 10 solana-ledger ^1.0.0
480 2 oxipng ^1.0.0
470 1 ryu-ecmascript dev ^1.8
470 3 enclave-runner ^1.10.0
450 1 libpapi_sys build ^1.8
440 parallel ^1.5
430 6 solana-core ^1.0.0
430 1 sqs-lambda ^1.11.1
430 1 exonum_libsodium-sys build ^1.10
430 cargo-crev ^1.10
420 2 darkredis dev ^1.12.0
410 5 deadpool ^1.11.1
390 blkar ~1.11.0
390 1 par-map ^1.2
370 7 desync ^1.10
370 4 ritual_common ^1.9.0
370 rustsym ^0.2.13
350 sincere ^1.10
350 collectd-plugin dev ^1.0
340 1 crev-lib ^1
320 routinator ^1.0
310 2 carrier ^1.10.0
300 fasttext-serving ^1.8.0
300 abrute ~1.7
290 ripb ^1.8
280 4 may ^1.1
280 2 sim2h = 1.11.1
280 v8 ^1.9.0
280 chess-move-gen ^1.8.0
280 indradb ^1.11.1
270 3 bellman_ce ^1
270 1 tensile ^1.7.0
260 sampi ^1.0
260 1 basalt ^1.11.0
260 geoq ^1.0
250 diskus ^1.0
250 sealrs ^1.10.0
240 1 loc ^1.8.0
240 1 rdedup-lib ^1.2.1
240 2 ffmpeg4-sys build ^1.0
230 nano-vanity ^1.8.0
230 parallel-gnuplot ^1.8.0
230 lonlat_bng ^0.2.13
220 tail-reader ^1.8.0
220 1 mioco ^1.0.0
210 1 dir-signature optional ^1.7.0
210 1 pleco ^1.10.0
210 shkeleton optional ^1.10
200 electrs ^1.0
200 rusty_express ^1.8
200 xcompress ^1.8.0
200 1 libtls-sys build ^1.11.0
200 3 simple-server ^1
180 rustful ^0.2
180 3 thruster-middleware ^1.0
180 ffmpeg-dev ^1.11.1
170 llvmenv ^1
170 3 basic_dsp_vector optional ^1.10.0
170 xcp ^1.11.1
160 fortanix-sgx-tools ^1.9.0
160 rzbackup ^1.2
160 1 thruster-server ^1.0
160 amber ^1.8.0
160 rsdb optional ^1.6
160 aster-proxy ^1.8
160 decentralized-internet ^1.11.1
160 libaster ^1.8
160 minutiae ^1.8.0
150 1 cht optional ^1.12.0
150 ffmpeg-screen-recorder ^1.8.0
150 smallpt ^1.11.1
150 lang_tester ^1.10
140 1 finalfrontier ^1
140 backup_rat ^1.0
140 ids_service ^1.10
140 wireguard-vanity-address ^1.0
140 1 executors optional ^1.12
140 merk ^1.10.0
140 r-rust dev ^1.0
130 2 kompact ^1.10
130 2 tree_magic_fork optional ^1.10.0
130 fddf ^1.10.1
130 1 matrixmultiply_mt ^1.10
130 arthas ^1.2
130 cat-rs ^1.10.0
130 actix-diesel ^1.9.0
130 3 rna-algos ^1.0
130 frugalos ^1
130 poolite ^1.2.1
120 5 bellman optional ^1
120 1 blocking-permit >= 1.11.1, < 1.13
120 pleco_engine ^1.10.0
120 finalfrontier-utils ^1
120 find-files ^1.0
120 acteur ^1.12.0
120 batch_resolve_cli ^1.3.0
120 pix-image-viewer ^1.11.0
120 fastmod ^1.8.0
120 pgc ^1.10
110 1 balloon ^1.0
110 finalfusion-utils ^1
110 iota-spammer ^1.8
110 1 asuran ^1.12.0
110 concurrent_prime_sieve ^1.2.1
110 estunnel ^1
110 rustneat ^1.0
100 axiom ^1.10.1
100 ensync ^1.8.0
100 1 sc-offchain ^1.10
100 sudoku-cli ^1.10.1
100 1 asynchronous ^0.2.5
100 1 self-meter ^1.1.0
100 pax ^1.6
100 topd ^1.6.2
100 cpp_to_rust ^1.0.0
abc ^0.2
actix-tools ^1.8
6 actori-server ^1.11
3 actori-threadpool ^1.10
affinity 1.*
1 agni ^1.8.0
akashi dev ^1
1 alternate-future ^0.2
alumina ^1.8
arcon_compiler ^1
async-cmd ^1.10.1
1 background-jobs-actix ^1.10.0
1 bagpipe ^1.5
banana ^1.2.1
banano-vanity ^1.8.0
barnes ^0.2.6
bayard ^1.11.1
bdflib ^1.12.0
bins ^1.3
bita ^1.12.0
1 bitar ^1.12
bitcoin-consensus build ^1.10.1
3 bitconch-jsonrpc-server-utils ^1.8
bottle dev ^1.0
broker-tokio optional ^1.8.0
bubbles ^1.12.0
build-parallel ^1.0
bustle dev ^1
cargo-bake ^0.2
cargo-crusader ^0.2.6
cargo-pando ^1.9.0
cargo-semverver ^1.0
cdbd ^1.5.0
celery-rs-core ^1.11.0
chilli ^1.0
ciseaux_client ^1
clobber ^1.10.1
cloc ^1.0
cntr 1.*
commit_artist ^1.0
controlgroup dev ^1.11.1
core-utils ^0.2.6
coroutine-rs dev *
cosworth ^1.9.0
3 cpp_to_rust_common ^1.0.0
1 cpr ^1.0
cpu-freq ^1.10
cpuprofiler-static build ^1.8
crast ^1.0
crcdir ^1.0
crupter ^1.10
csv-groupby ^1.0
dahl-salso ^1.12.0
dbq ^1.0
ddo ^1.12.0
deltamap ^1.0
dirscan ^1.12.0
dirty-dns ^1.10.1
dora 1.10.*
du-dup ^1.0
dusk-uds ^1.11
edsm-dumps-model ^1.11.1
electrscash ^1.0
elfmalloc ^1.5
1 ergo_sync ^1.8.0
es_runtime ^1.0
2 eternal ^1.11
fac ^1.5.0
fanta ^1.0
2 fast-rustc-ap-rustc_session ^1.0
fastforward ^1.12.0
1 ferrum ^1.8
filite ^1.11.1
finde-rs ^1.12.0
flock ^1.2
1 flowr ~1.10
flurry ^1.12.0
8 flv-future-aio dev ^1.10.1
forkjoin 0.2.*
fst-bin ^1.5
functiontrace-server ^1.0
futures-threadpool ^1.0
4 geng-core ^1
gitall ^1.9.0
gotop ^1.10.1
gperftools-static build ^1.8
graco ^1.0
granex ^1.8.0
grnenv-rs ~1.0
heatseeker ^1.7.0
1 hexe ^1.0.0
hnsw_rs ^1.8.0
html5ever-stream dev ^1.0
httpd ^1
hugo_to_json ^1.10
hyper-fs dev ^1.2.1
hyper-sync ^1.0
hyperdex *
image-interlacer ^1.10.0
image-resizer ^1.10.0
indradb-postgres ^1.8.0
integrity-checker dev ^1
1 iota-client ^1.10
1 iota-lib-rs-preview ^1.8
2 iota-pow ^1.10
1 iridium ^1.0
2 ispc_rt ^1.11
jsaas ^1.0
k2i ^1.0
1 kailua_langsvr ^1.2
kalavara ^1.0
1 kanidm ^1.10
kipa ^1.10.1
klaus ^1
kubernix ^1.10.1
libasuran ^1.11.1
libbruteforce ^1.11.1
1 librandtest ^1.6.2
librdkafka-sys build ^0.2
lkl build ^1.9
load-maker ^1.10.0
locustdb ^1.0
lok ^1.12.0
lucky_commit ^1.0
lzjd ^1.10.0
maketorrent ^1.0
marmoset ^1.12
maxim ^1.10.1
mercury ^1.7.0
mgit ^1.12.0
mini_http ^1
minutae ^1.4.0
mooncell ^1.10.1
nakatoshi ^1.10.1
nanopow-rs ^1.8
neofold ^1.0
ninja-build ^1
1 novel ^1.0
novel_extra ^1.0
4 ntex ^1.12
ocypod ^1.10
opentelemetry-stackdriver ^1.12
oper ^1.12.0
optlib dev ^1.12.0
1 oqueue dev ^1.0
2 ordered-parallel-iterator ^1.10
orf ^0.2.11
1 osm_pbf_iter ^1
osmptparser dev ^1.10.1
oxipng-wasm ^1.0.0
pairlock dev ^1.0
palarust ^1.0
1 parallel-iterator ^1.10.1
parsec-service dev ^1.10.1
pcp ^0.2.7
phase2 ^1
1 phase21 ^1
1 php-sys build ^1.0
phyloalifold ^1.0
1 phylofold ^1.0
2 phyloprob ^1.0
pipelines dev ^1.0
polyester ^1
pond ^1
poolter ^1.0
powersoftau ^1.7.0
primg ^1.7.0
prng dev ^1.7
prose_chan ^1.10.0
1 pumpkindb_engine ^1.3.0
pure_vorbis dev ^1.0.0
1 qbsdiff ^1.12
quandl-v3 ^1.0
rain_server ^1
ranagrams ^1
rargs ^1.0
rbtables ^1.0
readings-probe ^1.12.0
recloser dev ^1.11
redis-analyzer ^1.10
5 requiem-server ^1.11
3 requiem-threadpool ^1.10
reudh ^1.8.0
1 rnafamprob ^1.0
robin ^1.8.0
romeo ^1.8.0
1 rpcx_server ^1.0
rpm-timer ^1.7.0
rs-router dev ^1.1.0
rsure ^1.10
rtxon ^1.9
rucene ^1.10.0
ruget ^1.0
runtime-loop ^1.0
rust-quiz ^1.0
rust2vec-utils ^1
2 rustimate-templates ^1.11.1
rustomword ^1.10.0
1 rustpython-vm ^1.0
rux ^1.1.0
ruyi dev ^1.6
salt ^1.6.2
scavenger ^1.9
6 scrappy-server ^1.11
3 scrappy-threadpool ^1.10
seal_rs ^1.10.0
selene ^1.10
senstate dev ^1.10.1
sha1dir ^1.0
sha3sum ^1.0
3 shine-stdext ^1.10
1 shine-store ^1.8
shio ^1.6.2
2 shipyard optional ^1
silkbag *
silverknife *
3 simple_parallel dev ^0.2
simple_spawner ^1.0
simplesched dev *
snare ^1.12
snatch ^1.0
snoopy ^1.0
snowchains ^1.12.0
3 solana-jsonrpc-server-utils ^1.8
2 solitaire-templates ^1.11.1
son_of_grid_engine ^1.7
sotahyper dev ^0.2
sozu ^1.3.0
spork ^0.2.12
sqs-service-helper ^1.6.2
sstb ^1
1 stainless-ffmpeg-sys build ^1.0
starstruck ^1.0
stateright dev ^1.11.1
4 susy-jsonrpc-server-utils ^1.8
4 susydev-jsonrpc-server-utils ^1.8
swp ^1.11.1
1 tange ^1.0
tangle ^0.2.11
task-grep ^1.2
task_kit ^1.0
thingvellir ^1.0
thread-pool ^1.2.0
threader ^1.10.1
threading ^1.3
threadpool-crossbeam-channel ^1.6
tls_3d_to_2d ^1.0
1 tokio-async-std optional ^1.11.1
tvm ^1.8.0
uniprot optional ^1.12.0
urls2disk ^1.8
vanityhash ^1.0
voronoiify-image 1.0.*
warpgrapher ^1.0
webapp-backend ^1.10.1
1 workerpool ^1.7
yaar-lock optional ^1.11
yabs ^1.0
yottadb dev ^1.10.0
zee ^1.11.1
zim ^1.12
3 zkp-criterion-utils ^1.10.1
zou ^1.0