Heapless

Heapless is used at run time in 1,580 crates (of which 319 optionally). It is a direct run-time dependency in 490 crates. It's used at build time in 1 crate (). It's used only as a dev dependency in 126 crates (of which 30 directly).

Number of dependers	Heapless version	Downloads/month
905	0.8.0	1.2M
626	0.7.17	699K
52	0.6.1	15K
107	0.5.6	13K
16	0.4.4	180
1	0.2.7	0

Depender (with downloads and own rev deps)			Heapless version
9.4M	242	ipnet	optional	^0
2.6M	121	aead	optional	^0.7
886K	59	rstar		^0.8
835K	113	faster-hex		^0.8
1.4M	42	zvariant	optional	^0.8.0
889K	307	postcard	optional	^0.7.0
251K	49	smoltcp		^0.8
519K	30	crc-any	optional	^0.8
104K	4	serde_prometheus		^0.8
94K	97	embassy-sync		^0.8
89K	15	wasmer-wasix		^0.7.16
46K	6	flacenc		^0.8.0
43K	117	usb-device		^0.8
123K	5	octseq	optional	^0.8
121K	28	domain	optional	^0.8
94K	65	ts-rs	optional	>=0.7, <0.9
85K	35	serde-json-core	optional	^0.8
23K	12	embassy-time-queue-utils		^0.8
22K	11	pgrx		^0.8
20K	2	esp-idf-part		^0.8.0
16K	23	esp-idf-hal		^0.8
14K	23	embedded-svc		^0.8
14K	10	iso7816		^0.7
11K	2	bt-hci		^0.8
10K	15	embassy-usb		^0.8
8.9K	8	embassy-net		^0.8
8.4K	55	cortex-m-rtic		^0.7.7
8.4K	29	esp-idf-svc		^0.8
8.0K	5	coap-message-implementations		^0.8
22K	1	edge-executor	optional	^0.8
6.7K	18	embedded-sdmmc		^0.8
6.5K	1	embedded-test		^0.8.0
6.1K	2	esp-wifi		^0.8.0
5.7K	21	ansi-parser		^0.8.0
5.5K	4	elliptic-curve-tools		^0.8
4.3K	2	embedded-tls		^0.8
4.2K	38	atsamd-hal		^0.8
3.8K	17	heapless-bytes		^0.8
3.7K	1	reqwless		^0.8
3.6K	1	cyw43		^0.8.0
10K	4	mipidsi	optional	^0.8.0
3.4K	6	anise		^0.8.0
3.4K	1	liboscore-cryptobackend		^0.7
3.2K		minicbor-adapters		^0.8.0
3.2K	1	embedded-nal-coap		^0.7
2.8K	1	picoserve		^0.8.0
2.7K	6	postcard-rpc		^0.8.0
2.5K	1	edge-nal-embassy		^0.8
2.5K	11	stak-file		^0.8.0
2.4K	7	esp-hal-common		^0.8.0
2.4K	2	edge-dhcp		^0.8
2.4K	1	coap-message-demos		^0.7
2.2K	2	stak-dynamic		^0.8.0
2.2K	2	tlv-rs		^0.7.16
2.1K	5	minimq		^0.8
6.8K	8	sequential-storage	optional	^0.8.0
2.0K	3	nmea		^0.8
1.9K	3	rtic-sync		^0.8
1.8K	8	atat		^0.8
1.7K	4	littlefs2		^0.7
1.5K	8	palaver		^0.5
1.5K	5	sans-io-runtime		^0.8
1.5K	5	mqttrs		^0.7
1.3K	2	kanata-keyberon		^0.7.16
1.2K		buoyant		^0.8
1.2K	2	package-family-name		^0.8
1.0K		foundation-ur		^0.8
1.0K	5	aranya-fast-channels		^0.7
1.0K	2	aranya-runtime		^0.7
1.0K	9	aranya-policy-vm		^0.7
950		rust-mqtt		^0.8
900	2	va108xx-hal		^0.8
900	3	esp32-nimble		^0.8.0
3.2K		ts-rs-json-value	optional	^0.7
3.1K	6	rmodbus	optional	^0.8.0
2.9K	8	postcard-schema	optional	^0.7
700	3	apdu-dispatch		^0.7
700	1	usbd-human-interface-device		^0.8
600		moondancer		^0.8.0
600	1	ctap-types		^0.7
550	1	ppproto		^0.8.0
2.2K	3	littlefs2-core	optional	^0.7
550	2	va416xx-hal		^0.8
550	4	generic-btree		^0.7.16
2.1K	1	justjson	optional	^0.8.0
500		rsa_heapless		^0.8.0
500	3	smoltcp-nal		^0.7
1.9K	2	encdec-base	optional	^0.8.0
470	1	edge-nal-std		^0.8
470		se05x		^0.7
450		usbpd		^0.8.0
450	11	cortex-m-rtfm		^0.5.0
440		gt911		^0.8
1.8K	3	serde_at	optional	^0.8
430	2	nrf-softdevice		^0.8.0
420	1	nrfxlib		^0.7
400	1	doip-codec		^0.8.0
390		m5dial-bsp		^0.8.0
390	3	mfrc522		^0.8
370	1	edge-http		^0.8
370	1	ethercrab-wire		^0.8.0
370	1	async-io-mini		^0.8
360	1	udevrs		^0.8
360		usbd-ccid		^0.7
350		ethercrab		^0.8.0
350	3	embedded-nal-tcpextensions		^0.7
350	4	ws2812-esp32-rmt-driver		^0.8
310	1	riscv-slic		^0.8.0
310		person-sensor		^0.8.0
280	2	trackball		^0.8.0
270	1	edge-mdns		^0.8
270	2	loro-delta		^0.8.0
260		rmk		^0.8.0
260	4	hmac-sha		^0.7
240	1	embedded-websocket		^0.7.16
240		cheetah-game-realtime-protocol		^0.7.16
230	8	pgx		^0.7.16
230	3	miniconf_mqtt		^0.8
230	1	jh71xx-hal		^0.7
220	1	seeed-erpc		^0.5
210	3	serial-settings		^0.8
210		microscpi		^0.8.0
210	1	kiibohd-hid-io		^0.7.16
210	1	embedded-websocket-embedded-io		^0.8.0
200	1	embedded-nal-minimal-coapserver		^0.5
190		keytokey		^0.7
190	2	ockam_executor		^0.8
190		onecable		^0.8.0
190		rktk-drivers-nrf		^0.7.0
190		esp-at-nal		^0.8
180		ekv		^0.8
180		esp-ieee802154		^0.8.0
170	1	wasm4-impl		^0.7.9
1.0K	1	random_variant	optional	^0.7
160		hwatch		^0.8.0
950	1	serde-brief	optional	^0.8.0
150	3	embedded-nano-mesh		^0.8
150		zmodem2		^0.8.0
150		quectel-bg77		^0.7.3
140	1	eb90		^0.7
140		kolibri-embedded-gui		^0.8
140		esp-embassy-wifihelper		^0.8.0
140		iotzio		^0.8
140		psf-rs		^0.8.0
140	1	noproto		^0.8
130	2	kiibohd-hall-effect		^0.7
130	4	tracing-serde-structured		^0.7.10
130		poststation-fw-icd		^0.8
900	3	flexiber	optional	^0.7.0
900	3	cbor-smol	optional	^0.7
130		opslag		^0.8.0
120		mountain-mqtt		^0.8
120	14	wasmrs-codec		^0.7
120		ais		^0.7
110		cblt		^0.8.0
110		xdevs-no-std		^0.8
110		thermostat-eem		^0.8
800		satrs	optional	^0.7
100		kiibohd-hall-effect-keyscanning		^0.7
800	8	st7789	optional	^0.7
		embedded-jsonrpc		^0.8.0
750		serde-csv-core	optional	^0.7.16
		embedded-c-sdk-bind-hal		^0.8.0
		is31fl3743b		^0.7
		rx8900		^0.8
		log-to-defmt		^0.7
	3	signature_core		^0.7
	1	noshell-parser		^0.8.0
		tinygif		^0.7.16
		embedded-plots		^0.7.3
		ockam_entity		^0.7
		keyberon		^0.5
	1	minireq		^0.8
	1	lorawan-device		^0.7
		postcard-heapless-compat		^0.8.0
		writebuf-core		^0.7
		embassy-net-esp-hosted		^0.8
		shproto-rs		^0.7.16
	3	ushell		^0.8.0
		pacmog		^0.8.0
	2	gctex		^0.8.0
		nutp		^0.8
700		wasm-msgpack	optional	^0.7
		embassy-net-adin1110		^0.8
		embedded-fps		^0.7
		mini-rxtx		^0.7
		wio_terminal		^0.5
		embedded-huffman		^0.8.0
		hal-sim		^0.8
		rp-rs-radio-clock		^0.8
		tfmt		^0.8.0
	2	klogger		^0.7.14
	2	mqttrust		^0.7
		emc2101		^0.8
		miniconf_cli		^0.8.0
		Rusty_CryptoAuthLib		^0.5.5
		codec		^0.8.0
	1	embedded-update		^0.7
	2	sunset		^0.8
		heapless_topo		^0.8.0
		roboplc-rpc		^0.8
		zip_parser		^0.7
		eui-no-std		^0.5
		heapless_matrix		^0.8.0
		robokit		^0.7
		embedded-sdmmc-dev		^0.8
		mcutie		^0.7.0
		nw-engine		^0.8.0
	7	canadensis_core		^0.7.7
		riot-wrappers		^0.8
		emb-ssdraw		^0.8
	1	i2c-pio		^0.8.0
		le-stream		^0.8
		max11300		^0.8
		esp-hal-dhcp-server		^0.8.0
		senml-deser		^0.7
		foundation-firmware		^0.8
		prinThor		^0.8.0
		mvstore		^0.7
		blinker		^0.8
		erdnuss-comms		^0.7.0
		nrf-modem-nal		^0.7.10
		axum-postcard		^0.8
	3	dmx-rdm		^0.8
	7	kll-core		^0.7
550	3	micropb	optional	^0.8
		os_essentials		^0.8
	1	fuga-json-seq-parser		^0.7.16
	1	w5500-tls		^0.8
		nuttx-embedded-hal		^0.7.10
		pca9539		^0.8.0
		esp-hal-mfrc522		^0.8.0
		foundation-urtypes		^0.8
	1	ssp		^0.7
	2	canadensis		^0.7.0
		logz		^0.7.13
		ublox-sockets		^0.7
		max32660-hal		0.7.*
		nmea-0183-validator		^0.7.10
		esp8266-wifi-serial		^0.7
		finny		^0.7
		roci		^0.8
		ak09940a		^0.8
		esp8266-at-driver		^0.7
	1	futex-queue		^0.7
	1	monster_chess		^0.8.0
	1	tracing-rtt		^0.8
	3	drogue-network		^0.5
		sunset-async		^0.8
		anachro-forth-core		^0.7.8
	3	canadensis_can		^0.7.0
	2	canadensis_data_types		^0.7.7
		drogue-rak811		^0.5.5
		embedded-exfat		^0.7
	1	lpc55-rtic		^0.6.0
		choreographer		^0.7.1
		crdt-richtext		^0.7.16
		drogue-tls		^0.7
		scd30		^0.4.2
		disco-rs		^0.7
		rak811-at-driver		^0.7
		stm32wb-hal		^0.5.3
		barebones-watchface		^0.5.1
	5	kaspa-wallet-core		^0.8.0
		urpc		^0.5.1
		watchface		^0.5
		zipng		^0.7.16
	1	a4-core		^0.7.8
	2	byte-slab		^0.7.5
		crankstart		^0.6.1
		leak-detect-allocator		^0.5.4
	1	phm		^0.7.10
		drogue-http-client		^0.5
		nrf52-bin-logger		^0.5.1
		orouter-serial		^0.7
		stretch2		^0.7.9
		svisual		^0.7
		ublox-cellular-rs		^0.7
		drogue-es-wifi		^0.5.6
	1	drogue-ffi-compat		^0.5.5
		edge-std-nal-async		^0.8
		factbird-common		^0.7
		fuga-remo-api		^0.7.16
		ltc681x		^0.8.0
		rfm69-async		^0.7.16
	2	anachro-icd		^0.5.5
		blipper		^0.5.1
		can_aerospace_lite		^0.7.4
	1	embedded-nal-minimal-coaptcpserver		^0.7
	1	graphite_magma		^0.7.15
		infinity-sampler		^0.8
	1	pinetime-mynewt		^0.5.1
		quicklog		^0.7.16
	3	rktk		^0.7.0
		synth-utils		^0.7
	1	vhrdcan		^0.5.6
		alg-grid		^0.5
		ansi_parser_extended		^0.8.0
		drgdfu		^0.7
		handdrawn-watchface		^0.5.1
		hwatch-ansi-parser		^0.6.1
	1	kiibohd-hid-io-ffi		^0.7.10
		mcumeter		^0.7
		timesource		^0.7.8
	3	trussed		^0.7
		ublox-short-range-rs		^0.5
		veriform		^0.5
		algo_no_std		^0.7.16
		canboat-rs		^0.8.0
		esp-at-driver		^0.6.1
		esp-hal-mdns		^0.8.0
	1	expanse		^0.5.1
		lc3-codec		^0.7.10
	1	oktree		^0.8.0
	1	rucos		^0.7
		sirena		^0.7
		wire4		^0.5.2
		ascii-osd-hud		^0.6
		booster		^0.8
		canadensis_bxcan		^0.7
		core-serde-json		^0.5.0
		dmx512-rdm-protocol		^0.8.0
		es-wifi-driver		^0.7
	2	graphite_server		^0.7.15
	3	hid-io-protocol		^0.7
		mks979b		^0.7.10
	1	moonboot		^0.7
		multi-mission-library-rs		^0.8.0
		mwatch-kernel-stm32l4		^0.4.2
		rand_pwd		^0.5.5
		stabilizer		^0.8
		tiny-nmea		^0.7.5
		aem10900		^0.8.0
		alrulab-core		^0.8.0
	1	cody-c		^0.8.0
		junctor		^0.5.5
		light-cli		^0.4.2
		lpwan		^0.5.5
		oath-authenticator		^0.7
	2	phm-icd		^0.7.10
		rustuino		^0.7.7
		digital-filter		^0.5.1
		drogue-esp8266		^0.5.5
		fido-authenticator		^0.7
	1	hm11		^0.4.1
		itsdns		^0.7
		kiibohd-core-ffi		^0.7
		mnemos		^0.7.10
	1	mqttrust_core		^0.7
		ndef		^0.8
		nostr-nostd		^0.7.14
		rustworks		^0.7
		ssd1362		^0.5
		ad7147		^0.7.16
		anachro-server		^0.5.5
		bandsocks-sand		^0.5
	1	canadensis_serial		^0.7.7
		hopter		^0.8
	2	mwatch_kernel		^0.4.2
	1	pinetime-lvgl		^0.5.3
		sidh		^0.7.7
		sma-proto		^0.8.0
		uhr		^0.4.2
		vax-number		^0.7
		at-cryptoauth		^0.7
	1	canadensis_udp		^0.7.7
	1	dot15d4-frame		^0.8.0
		etherage		^0.7.16
		gmqtt		^0.7.7
		myser		^0.7.15
		nucleo-h7xx		^0.7.16
	2	pinetime-watchface		^0.5.1
		rart-rs		^0.7.10
		rfc3339		^0.8.0
		socketcand		^0.8.0
		state-governor		^0.7.4
		trenchcoat		^0.7
		ufmt-utils		^0.7.16
		usbd-ethernet		^0.8
		blues-notecard		^0.7
		coap-zero		^0.7
	1	hid-io-core		^0.7
		n2k		^0.5.5
	1	ockam_signature_core		^0.6
		phm-worker		^0.7.10
	1	purezen		^0.4
		py32f030_hal		^0.7
	2	rktk-drivers-common		^0.7.0
	3	rubble		^0.5.1
	1	usb-pd		^0.7.16
		verdigris		^0.6
		vesc-comm		^0.4.1
		bl602-sdk		^0.7.3
		blinq		^0.7.0
	1	canadensis_pnp_client		^0.7.7
		coap-gatt-utils		^0.7.16
		crosstrait		^0.8
		dango-core		^0.7.16
	2	dcs2		^0.7.16
		esp32-wroom-rp		^0.7.16
		google-cloud-iot-jwt		^0.7.9
		hc14-at-rs		^0.7
		itla		^0.7
	1	kiibohd-usb		^0.7
		knetrs		^0.7.16
		liecs		^0.8.0
		mqtt-sn		^0.7.7
		rustot		^0.7.0
		scalesocket		^0.8.0
		smoltcp_null_modem		^0.8
		stak-primitive		^0.8.0
		stratum-v1		^0.8
		wurth-calypso		^0.7.16
		compact-map		^0.8
		fusb302b		^0.7.16
		iqs323-driver		^0.8.0
		is31fl3733		^0.7.16
		norfs		^0.7
	1	rainmaker-components		^0.8.0
	1	rpk-firmware		^0.8
		rs-matter		^0.7.16
		seeed-lora-e5-at-commands		^0.8.0
		smbus-adapter		^0.8
		smoltcp-rmodbus		^0.8.0
		ssd1331-async		^0.8.0
	1	winget-types		^0.8
500		no_alloc	optional	^0.5.5
420	2	postcard-bindgen-core	optional	^0.8.0
330		embedded-msgpack	optional	^0.7
250		py-rs	optional	>=0.7, <0.9
230		mayheap	optional	^0.8
210	1	esp-partition-table	optional	^0.8
190	18	ockam_node	optional	^0.8
120	2	kiibohd-keyscanning	optional	^0.7
110		ockam_transport_ble	optional	^0.8.0
110		edge-frame	optional	^0.8
		msgpck	optional	^0.7.16
		ockam_vault_core	optional	^0.7
		sacn-unofficial	optional	^0.5.3
	1	channel-bridge	optional	^0.8
	2	ft6x06	optional	^0.7
		rsiot	optional	^0.8.0
		creature_feature	optional	^0.7.16
		every_variant	optional	^0.7.0
		bin-utils	optional	^0.7.16
	1	blipper-shared	optional	^0.5.5
		buf_sized	optional	^0.8.0
		fastprio	optional	^0.7.16
		flex-dns	optional	^0
		kvs	optional	^0.7.15
		macbinary	optional	^0.7.16
		mipidsi-async	optional	^0.7.16
		nb-executor	optional	^0.7.10
		ockam_credential	optional	^0.6
		orouter-wireless	optional	^0.7
		ourobuf	optional	^0.8
		pybadge-high	optional	^0.7.16
	3	rktk-keymanager	optional	^0.7.0
	2	rktk-rrp	optional	^0.7.0
		rw-exact-ext	optional	^0.8
		satrs-core	optional	^0.7
	2	ser-write	optional	^0.8
		simple-tlv	optional	^0.6.0
		stor	optional	^0.7.9
		systemview-target	optional	^0.7
		unchecked-std	optional	^0.8.0
		usecop	optional	^0.8
357K	83	pretty-hex	dev	^0.8
10K	15	rp-pico	dev	^0.7.16
7.9K	45	stm32f4xx-hal	dev	^0.8
5.1K	6	nu-pretty-hex	dev	^0.8
2.9K	33	stm32f1xx-hal	dev	^0.7.16
1.2K	1	esp32c3-hal	dev	^0.8.0
1.0K	3	esp32-hal	dev	^0.8.0
950	4	serde-indexed	dev	^0.7.16
900		esp32s3-hal	dev	^0.8.0
700		esp32s2-hal	dev	^0.8.0
600	3	micromap	dev	^0.8.0
600		n32g4xx-hal	dev	^0.8
550		esp32c6-hal	dev	^0.8.0
470		esp32c2-hal	dev	^0.8.0
400		postcard-bindgen	dev	^0.8.0
360		adafruit-seesaw	dev	^0.8
350	2	sh1106	dev	^0.7.10
340		feather_m0	dev	^0.8
310	7	miniconf	dev	^0.8.0
250	2	toad-msg	dev	^0.7
240	1	lpc55-hal	dev	^0.7
210	1	riscv-peripheral	dev	^0.8.0
210		esp32h2-hal	dev	^0.8.0
190	6	stm32l4xx-hal	dev	^0.5
160	1	lorawan	dev	^0
140		feather_m4	dev	^0.7
110	1	stm32l0xx-hal	dev	^0.7.1
100	1	ufmt_float	dev	^0.7
	1	atoi_radix10	dev	^0.7
	1	dwm1001	dev	^0.7.8
	1	flem	dev	^0.7
		gsw	dev	^0.7
	2	stm32f1xx-hal-bxcan	dev	^0.5.6
	2	canadensis_encoding	dev	^0.7.0
		sized-dst	dev	^0.8
		mwatch-sdk	dev	^0.4.1
		canadensis_macro	dev	^0.7.7
		ds1302	dev	^0.6
		adafruit-kb2040	dev	^0.7.16
		htpa32x32d	dev	^0.4.0
		lpc55s6x-hal	dev	^0.5
		cmim	dev	^0.5.1
		firmware-controller	dev	^0.7
	1	kwap-msg	dev	^0.7
		pulau-rs	dev	^0.7.16
		dyn_phy	dev	^0.8
		itsybitsy_m0	dev	^0.7
		caprand	dev	^0.8
		p1am_100	dev	^0.7
		xmc4-hal	dev	^0.8.0
		ch58x-hal	dev	^0.8.0
		oled_async	dev	^0.7.10
		todc-mem	dev	^0.7