num_cpus

num_cpus is used at run time in 6,716 crates (of which 1,108 optionally, 537 directly). It's used at build time in 135 crates (of which 27 optionally, 23 directly). It's used only as a dev dependency in 1,528 crates (35 directly).

Number of dependers	num_cpus version	Downloads/month
8,217	1.13.0	960K
3	1.11.1	13K
3	1.10.1	58K
1	1.7.0	3.4K
2	1.0.0	41
152	0.2.13	8.8K
1	0.1.0	13

Depender (with downloads and own rev deps)			num_cpus version
1.1M	35	ryu	dev	^1.8
951K	2687	tokio	optional	^1.8.0
795K	1692	hyper	dev	^1.0
743K	27	remove_dir_all		^1.13
658K	67	futures-executor	optional	^1.8.0
653K	389	crossbeam-channel	dev	^1.13.0
616K	27	gimli	dev	^1
567K	7	rayon-core		^1.2
529K	41	arc-swap	dev	~1
291K	34	tokio-reactor		^1.8.0
284K	11	jobserver	dev	^1.0
275K	25	tokio-threadpool		^1.2
220K	127	threadpool		^1.13
200K	94	futures-cpupool		^1.0
153K	505	async-std	optional	^1.12.0
117K	8	actix-threadpool		^1.10
112K	91	rusttype	optional	^1.0
98K	77	smol	dev	^1.13.0
97K	12	actix-server		^1.13
64K	61	dashmap		^1.13.0
51K	361	tokio-core	dev	^1.0
42K	4	rustc-rayon-core		^1.2
36K	2	async-global-executor		^1.13
33K	160	rocket		^1.0
27K	7	rustc-ap-rustc_session		^1.0
22K	1	kvdb-rocksdb		^1.10.1
20K	13	futures-executor-preview	optional	^1.0
16K	67	cargo		^1.0
13K	137	iron		^1.0
12K	18	rouille		^1
12K	4	leveldb-sys	build	^1.10
12K		grcov		^1.13
11K	12	sprs	optional	^1.13.0
10K	6	inferno	optional	^1.10
9.5K	7	psutil	optional	^1.11.1
9.4K	9	deadpool		^1.11.1
8.7K	14	bus		^1.6.2
7.8K	3	duckscriptsdk		^1
7.8K	2	actix-net		^1.0
5.0K	1	storage-proofs-porep		^1.10.1
5.0K	1	storage-proofs-post		^1.10.1
5.0K	3	storage-proofs-core		^1.10.1
4.4K	1	phase21		^1
4.2K	7	bellperson	optional	^1
4.2K		sccache		^1.0
4.1K	13	tree_magic	optional	^1
4.1K	20	core_affinity		^1.6.2
3.9K	1	tokio-io-pool		^1.8
3.7K		ripgrep		^1.8.0
3.6K	14	tantivy		^1
3.2K		exa		^1.10.0
3.1K	4	bastion-executor		^1.13
3.1K	2	sass-sys	build	^1.9.0
2.5K	1	readings-probe		^1.12.0
2.3K	2	par-map		^1.2
2.3K	6	flv-future-aio	dev	^1.10.1
2.2K	1	sc-offchain		^1.10
2.1K		fd-find		^1.8
2.0K		build-parallel		^1.0
2.0K	6	jwalk	dev	^1.12
1.9K	1	criterion-stats		^1
1.7K	3	enclave-runner		^1.10.0
1.6K	3	bastion	dev	^1.13.0
1.6K	7	bellman	optional	^1
1.6K	28	fibers		^1
1.5K	15	gotham		^1.8
1.5K	1	texture-synthesis		^1.12.0
1.4K	4	argonautica		^1.10
1.3K	5	solana-rayon-threadlimit		^1.13.0
1.2K		du-dust		^1
1.2K	1	cargo-deadlinks		^1.8
1.2K	17	fluvio-future	dev	^1.10.1
1.2K		thingvellir		^1.0
1.1K	31	solana-runtime		^1.13.0
1.1K		xsv		^1.4
1.0K		thread-pool		^1.2.0
1.0K	10	riker		^1.13.0
900	2	sqs-lambda		^1.11.1
800	2	ffmpeg-sys-next	build	^1.11
800	2	bellman_ce		^1
800	1	ryu-js	dev	^1.8
800	2	thruster		^1.0
750	13	fibers_global		^1
750	6	ntex		^1.12
700	3	nannou		^1
650	5	datafusion		^1.13.0
650	1	exonum_libsodium-sys	build	^1.10
600	5	smol-potat		^1.13
600	1	checksums		^1.4
550		solana-keygen		^1.13.0
550	1	uvth		^1.10.1
550		tin-summer		^1.10.0
550	2	snowchains_core		^1.13.0
500	4	darkredis	dev	^1.12.0
490		fortanix-sgx-tools		^1.9.0
480	9	solana-ledger		^1.13.0
450		rusty-tags		^1.10.0
440	2	ravif		^1.13.0
430		dua-cli		^1.10.0
430	8	solana-core		^1.13.0
430	2	fastobo	optional	^1.12.0
420	3	ryu-ecmascript	dev	^1.8
420	1	ccl		^1.10.1
410	1	self-meter		^1.1.0
390	4	flurry		^1.12.0
390		routinator		^1.12.0
370	7	romio		^1.10.0
350	2	stainless-ffmpeg-sys	build	^1.11
340		lelet		^1.13.0
330	4	ffmpeg-sys	build	^1.11
310	1	juliex		^1.9.0
310	1	libpapi_sys	build	^1.8
310	4	may		^1.1
300		podcast		^1.13
280		ff-find		^1
270	4	ritual_common		^1.9.0
270	1	executors	optional	^1.12
260	3	simple-server		^1
260	2	shipyard	optional	^1
250	1	sincere		^1.10
240	3	bevy_tasks		^1
240		quaint		^1.11
240	4	vrp-core		^1.13.0
240		sampi		^1.0
230	2	tensile		^1.7.0
230	2	sim2h		=1.11.1
230	1	tasque		^1
230		xcompress		^1.8.0
220	1	iota-lib-rs		^1.10
220	3	geng-core		^1
220	1	mioco		^1.0.0
220		goose		^1.0
210	5	git-features	optional	^1.13.0
210	7	ndarray-parallel	dev	^1.2
210	2	bitar		^1.13
210		vrp-cli		^1.13.0
200	8	kayrx		^1.12.0
200	1	tokio-async-std	optional	^1.11.1
200	7	desync		^1.10
190	1	loc		^1.8.0
180		affinity		1.*
170	1	pleco		^1.10.0
170		amadeus		^1.13
170		cargo-pgx		^1.13.0
170		sniffglue		^1.6
170		acteur		^1.12.0
170	1	background-jobs-actix		^1.10.0
170	1	spirit-tokio		~1
160	2	rdedup-lib		^1.2.1
160		rustful		^0.2
160		diskus		^1.0
160	1	stateright	dev	^1.13
160		cargo-crev		^1.12.0
160	2	lair_keystore_api		^1
160		collectd-plugin	dev	^1.0
160		yaar-lock	optional	^1.11
150	1	crev-lib		^1.12.0
150	1	pgx-pg-sys	build	^1.13.0
150	1	geng		^1
140	2	carrier		^1.10.0
140		rustsym		^0.2.13
140		xcp		^1.13.0
140		shkeleton	optional	^1.10
140		parallel		^1.5
140		actix-diesel		^1.9.0
140	1	workerpool		^1.7
130		rust-clacc	dev	^1.13.0
130		sealrs		^1.10.0
130		drill		^1.13.0
130	1	blocking-permit		>=1.11.1, <1.14
130	3	blockish		^1
130	2	dbui-templates		^1.11.1
120		llvmenv		^1.13.0
120		udp_server		^1.8
120		ffmpeg-dev		^1.11.1
120		yadms-storage		^1
120		functiontrace-server		^1.0
120	1	basalt		^1.11.1
120		v8		^1.9.0
110		fasttext-serving		^1.8.0
110	3	simple_parallel	dev	^0.2
110	1	awak		^1.13
110	2	tree_magic_fork	optional	^1.10.0
110	1	libtls-sys	build	^1.12.0
110		chess-move-gen		^1.13.0
110	2	thruster-middleware		^1.0
110		nano-vanity		^1.8.0
110	1	asuran		^1.13.0
100		electrs		^1.0
100		rsdb	optional	^1.6
100		hyperpolyglot		^1.13.0
100		selene		^1.10
100		lang_tester		^1.10
100	2	tfrecord	optional	^1.13
100		thruster-server		^1.0
100	4	rna-algos		^1.0
100	1	finalfrontier		^1
100		bdflib		^1.12.0
100		recloser	dev	^1.13
		abc		^0.2
		abrute		~1.7
		actix-dynamic-threadpool		^1.10
		actix-tools		^1.8
	6	actori-server		^1.11
	3	actori-threadpool		^1.10
		adult-dl		^1.0
	1	agni		^1.8.0
		akashi	dev	^1
		alan-runtime		^1.0
	1	alternate-future		^0.2
		alumina		^1.8
		amber		^1.8.0
		amiya	dev	^1
		antler		1.13.*
		aom-decode	dev	^1.13.0
		arcon_compiler		^1
		arthas		^1.2
		aster-proxy		^1.8
		asuran-cli		^1.13.0
		async-cmd		^1.10.1
	1	asynchronous		^0.2.5
		axiom		^1.10.1
		backup_rat		^1.0
		bader		^1.13.0
	1	bagpipe		^1.5
	1	balloon		^1.0
		banana		^1.2.1
		banano-vanity		^1.8.0
		barnes		^0.2.6
	3	basic_dsp_vector	optional	^1.10.0
		batch_resolve_cli		^1.3.0
		bayard		^1.13.0
		bayard-rest		^1.13.0
	1	bc4py_hash		^1.0
		benchrs		^1.13.0
		bex		^1.0
		bins		^1.3
		bita		^1.13.0
		bitcoin-consensus	build	^1.10.1
	3	bitconch-jsonrpc-server-utils		^1.8
		blkar		~1.11.0
		bottle	dev	^1.0
		broker-tokio	optional	^1.8.0
		bubbles		^1.13.0
		bumpalo-herd	dev	~1
		bustle	dev	^1
		cargo-bake		^0.2
		cargo-crusader		^0.2.6
		cargo-pando		^1.9.0
		cargo-semverver		^1.0
		cat-rs		^1.10.0
		cavif		^1.13.0
		cdbd		^1.5.0
		celery-rs-core		^1.11.0
		chilli		^1.0
	1	cht	optional	^1.12.0
		ciseaux_client		^1
	4	ckb-network		^1.10
	1	ckb-rpc		^1.10
	6	ckb-shared		^1.10
		clobber		^1.10.1
		cloc		^1.0
		cntr		1.*
		commit_artist		^1.0
		concorde	dev	^1.13.0
		concurrent_prime_sieve		^1.2.1
		consalifold		^1.0
	1	conshomfold		^1.0
	2	consprob		^1.0
		controlgroup	dev	^1.11.1
		core-utils		^0.2.6
		coroutine-rs	dev	*
		cosworth		^1.9.0
		cpp_to_rust		^1.0.0
	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
	1	criner		^1.13.0
		crupter		^1.10
		crymap		^1.13
		csv-groupby		^1.0
	1	d3-core		^1.13
		dahl-salso		^1.12.0
		dbq		^1.0
		ddo		^1.12.0
		decentralized-internet		^1.11.1
		deltamap		^1.0
		deno_plugin_num_cpus		^1.13.0
	1	dep-graph		^1.13
		diect-rs		^1.13.0
	1	dir-signature	optional	^1.7.0
		dirscan		^1.12.0
		dirty-dns		^1.10.1
		distiller		^1.13.0
		dora		1.10.*
		du-dup		^1.0
		du2		^1.13.0
		dusk-uds		^1.11
		ecoz2		^1.0
		edsm-dumps-model		^1.11.1
		electrscash		^1.0
		elfmalloc		^1.5
		ensync		^1.8.0
	1	ergo_sync		^1.8.0
		es_runtime		^1.0
		estunnel		^1
	2	eternal		^1.11
		fac		^1.5.0
		fanta		^1.0
	2	fast-rustc-ap-rustc_session		^1.0
		fast-threadpool		^1.13.0
		fastforward		^1.13.0
		fastmod		^1.8.0
	2	fawkes-crypto-bellman_ce	optional	^1
		fawkes-crypto-phase2		^1
		fawkes-crypto-powersoftau		^1.7.0
		fddf		^1.10.1
	1	ferrum		^1.8
	1	ffav-sys	build	^1.11
		ffmpeg-screen-recorder		^1.8.0
	1	ffmpeg4-sys	build	^1.0
		filite		^1.11.1
		finalfrontier-utils		^1
		finalfusion-utils		^1
		find-files		^1.0
		finde-rs		^1.12.0
		flock		^1.2
	1	flowr		~1.10
		forkjoin		0.2.*
		frawk		^1.13.0
		frugalos		^1
		fst-bin		^1.5
		fts_gitignore_nuke		^1.13.0
		futures-net		^1.13.0
		futures-threadpool		^1.0
		gchdb		^1.13.0
		geoq		^1.0
		gitall		^1
		gkosgrep		1.*
		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		*
		ids_service		^1.10
		image-interlacer		^1.10.0
		image-resizer		^1.10.0
		imaged		^1
		indradb		^1.11.1
		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	iota-pow-preview		^1.11.1
		iota-spammer		^1.8
		ipmimonitoring-sys	build	^1.0
	1	iridium		^1.0
		isla		^1.10.1
	2	ispc_rt		^1.11
		jpegxl-rs		^1.13.0
		jsaas		^1.0
		jupiter		^1.13.0
		jupiter-rs		^1.13.0
		k2i		^1.0
	1	kailua_langsvr		^1.2
		kalavara		^1.0
	1	kanidm		^1.10
	1	kayrx-karx		^1.12.0
		kcpserver		^1.8
		kipa		^1.10.1
		klaus		^1
	4	koibumi-node		^1.13.0
	2	kompact		^1
		kras		^1.13.0
		kubernix		^1.10.1
		leanify-many		^1.13
		leaves		^1.13
		libaster		^1.8
		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		^1.13.0
		lonlat_bng		^0.2.13
		lucky_commit		^1.0
		lzjd		^1.10.0
		maketorrent		^1.0
		marmoset		^1.12
	1	matrixmultiply_mt		^1.10
		maxim		^1.10.1
		mcrt		1.13.*
		measured-future-rs	dev	^1
		meli		^1.12.0
		meow-vanity		^1.8.0
		mercury		^1.7.0
	1	merk		^1.10.0
		mgit		^1.13.0
		mini_http		^1
		minutae		^1.4.0
		minutiae		^1.8.0
		moka		^1.13
		mooncell		^1.10.1
		mth_calc		^1.0
		muid		^1.13.0
		multistochgrad		^1.8.0
		nakatoshi		^1.13.0
		nanopow-rs		^1.8
		neofold		^1.0
		ninja-build		^1
		ninjars		^1.0
		nix-doc		^1.13.0
		node-replication	dev	^1.12
	1	novel		^1.0
		novel_extra		^1.0
		opentelemetry-stackdriver		^1.12
		oper		^1.12.0
		optlib	dev	^1.12.0
	1	oqueue	dev	^1.0
	2	ordered-parallel-iterator		^1.13
		orf		^0.2.11
	1	osm_pbf_iter		^1
		osmptparser	dev	^1.10.1
		oxipng-wasm		^1.0.0
		packetcrypt		^1.13
		pairlock	dev	^1.0
		palarust		^1.0
		parallel-gnuplot		^1.8.0
	1	parallel-iterator		^1.13.0
		pax		^1.6
		pcp		^0.2.7
		perbase		^1.13.0
		pfecs		^1.13.0
		pgc		^1.10
		phase2		^1
	1	php-sys	build	^1.0
		phyloalifold		^1.0
	1	phylofold		^1.0
	2	phyloprob		^1.0
		pineappl_cli		^1.0
		pipelines	dev	^1.0
		pix-image-viewer		^1.11.0
		pleco_engine		^1.10.0
		polyester		^1
		pond		^1
		poolite		^1.2.1
		poolter		^1.0
		postgres-parser	build	^1.13.0
		powersoftau		^1.7.0
	1	pprexec	optional	^1.13
	1	ppserver		^1.13
		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
		purrmitive		^1.0
	1	qbsdiff		^1.13
		quandl-v3		^1.0
		r-rust	dev	^1.0
		rain_server		^1
		ranagrams		^1
		rargs		^1.13.0
		rbtables		^1.0
		recursum		^1.13.0
		redis-analyzer		^1.10
	5	requiem-server		^1.11
	3	requiem-threadpool		^1.10
		reudh		^1.8.0
		ripb		^1.8
		rlocc		^1.12.0
	1	rnafamprob		^1.0
		robin		^1.8.0
		romeo		^1.8.0
		roundqueue		^1.6
	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-code-analysis-cli		^1.13
		rust-quiz		^1.0
		rust2vec-utils		^1
		rustasim		^1.13.0
	2	rustimate-templates		^1.11.1
		rustneat		^1.0
		rustomword		^1.13.0
	1	rustpython-vm		^1
		rusty_express		^1.8
		rusty_ffmpeg	build	^1.13.0
		rusty_pool		^1.13.0
		rux		^1.1.0
		ruyi	dev	^1.6
		rzbackup		^1.2
		s3m		^1.13
		salt		^1.6.2
		sandboxfs		^1.11
		sbert		^1.13
		scavenger		^1.9
	6	scrappy-server		^1.11
	3	scrappy-threadpool		^1.10
		scrumple		^1.6
		seal_rs		^1.10.0
		see		^1.13.0
		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
		silkbag		*
		silverknife		*
		simple-test-bbarekas		^1
		simple_spawner		^1.0
		simplesched	dev	*
		smallpt		^1.11.1
		snare		^1.12
		snatch		^1.0
		snoopy		^1.0
	3	solana-jsonrpc-server-utils		^1.8
	2	solitaire-templates		^1.11.1
		son_of_grid_engine		^1.7
		sotahyper	dev	^1.0
		sozu		^1.3.0
		spatial-join	optional	^1
		spork		^0.2.12
		sqs-service-helper		^1.6.2
		sstb		^1
		starstruck		^1.0
		stateful_async_worker		^0.1
		stellar_vanity	dev	^1.0
		sudoku-cli		^1.10.1
	4	susy-jsonrpc-server-utils		^1.8
	4	susydev-jsonrpc-server-utils		^1.8
		swp		^1.11.1
		tail-reader		^1.8.0
	1	tange		^1.0
		tangle		^0.2.11
		task-grep		^1.2
		task_kit		^1.0
		threader		^1.10.1
		threading		^1.3
		threadpool-crossbeam-channel		^1.6
		threadpool_scope		^1.13
		tio	optional	^1.12.0
		tls_3d_to_2d		^1.0
		topd		^1.6.2
		tophat	dev	^1.13.0
		tree-magic-cli		^1.13.0
	1	ttserver		^1.13
		tvm		^1.8.0
		uniprot	optional	^1.12.0
		unleash-api-client	dev	^1.13.0
		uppercut	dev	^1.13.0
		urls2disk		^1.8
		urlsup		^1.12.0
		uu_nproc		^1.10
		vanityhash		^1.0
		vcsr		^1.0
		vkcargo		^1.0
		voronoiify-image		1.0.*
		warpgrapher		^1.0
		webapp-backend		^1.10.1
		wireguard-vanity-address		^1.0
		witnet-vanity		^1.13.0
		x264-dev	build	^1.11.1
		xgadget	optional	^1.13
		yabs		^1.0
		yadf		^1.13.0
		yottadb	dev	^1
		zee		^1.11.1
		zerostash		^1.13.0
		zim		^1.12
	3	zkp-criterion-utils		^1.10.1
	4	zkp-primefield	dev	^1.12.0
		zou		^1.0
		zs-filecrawler		^1.13