Double-render function components with Hooks in DEV in StrictMode

[gaearon]

Reverts #14652

In case we want to get it in

[bvaughn]

I don't have an objection to this, considering it's DEV-only and only for components using hooks.

[sizebot]

ReactDOM: size: 0.0%, gzip: -0.0%

Details of bundled changes.

Comparing: 9944392...89f93c6

react-dom

File	Filesize Diff	Gzip Diff	Prev Size	Current Size	Prev Gzip	Current Gzip	ENV
react-dom.development.js	+0.1%	0.0%	739.07 KB	740.08 KB	170.55 KB	170.61 KB	UMD_DEV
react-dom.production.min.js	0.0%	-0.0%	98.88 KB	98.88 KB	32.18 KB	32.18 KB	UMD_PROD
react-dom.profiling.min.js	0.0%	-0.0%	101.86 KB	101.86 KB	32.83 KB	32.82 KB	UMD_PROFILING
react-dom.development.js	+0.1%	0.0%	734.13 KB	735.14 KB	169.12 KB	169.18 KB	NODE_DEV
react-dom.production.min.js	0.0%	-0.0%	98.88 KB	98.88 KB	31.67 KB	31.67 KB	NODE_PROD
react-dom.profiling.min.js	0.0%	-0.0%	101.98 KB	101.98 KB	32.29 KB	32.29 KB	NODE_PROFILING
ReactDOM-dev.js	+0.2%	+0.1%	756.7 KB	758.01 KB	170.36 KB	170.53 KB	FB_WWW_DEV
react-dom-unstable-fire.development.js	+0.1%	0.0%	739.42 KB	740.42 KB	170.69 KB	170.75 KB	UMD_DEV
react-dom-unstable-fire.production.min.js	0.0%	-0.0%	98.89 KB	98.89 KB	32.19 KB	32.18 KB	UMD_PROD
react-dom-unstable-fire.profiling.min.js	0.0%	-0.0%	101.88 KB	101.88 KB	32.83 KB	32.83 KB	UMD_PROFILING
react-dom-unstable-fire.development.js	+0.1%	0.0%	734.48 KB	735.48 KB	169.26 KB	169.33 KB	NODE_DEV
react-dom-unstable-fire.production.min.js	0.0%	-0.0%	98.9 KB	98.9 KB	31.68 KB	31.68 KB	NODE_PROD
ReactFire-dev.js	+0.2%	+0.1%	755.91 KB	757.22 KB	170.31 KB	170.48 KB	FB_WWW_DEV
ReactFire-prod.js	0.0%	-0.0%	301.09 KB	301.09 KB	55.26 KB	55.26 KB	FB_WWW_PROD
ReactFire-profiling.js	0.0%	-0.0%	308.18 KB	308.18 KB	56.55 KB	56.55 KB	FB_WWW_PROFILING
react-dom-test-utils.development.js	0.0%	-0.0%	44.87 KB	44.87 KB	12.3 KB	12.3 KB	UMD_DEV
react-dom-test-utils.development.js	0.0%	-0.0%	44.59 KB	44.59 KB	12.24 KB	12.24 KB	NODE_DEV
react-dom-unstable-native-dependencies.development.js	0.0%	-0.0%	60.61 KB	60.61 KB	15.92 KB	15.92 KB	UMD_DEV
react-dom-unstable-native-dependencies.production.min.js	0.0%	0.0%	11.01 KB	11.01 KB	3.81 KB	3.81 KB	UMD_PROD
react-dom-unstable-native-dependencies.development.js	0.0%	-0.0%	60.29 KB	60.29 KB	15.79 KB	15.79 KB	NODE_DEV
react-dom-unstable-native-dependencies.production.min.js	0.0%	0.0%	10.75 KB	10.75 KB	3.71 KB	3.71 KB	NODE_PROD
react-dom-server.browser.development.js	0.0%	0.0%	125.09 KB	125.09 KB	33.35 KB	33.35 KB	UMD_DEV
ReactDOMServer-dev.js	0.0%	-0.0%	122.4 KB	122.4 KB	32.07 KB	32.07 KB	FB_WWW_DEV
ReactDOMServer-prod.js	0.0%	-0.0%	45.18 KB	45.18 KB	10.4 KB	10.39 KB	FB_WWW_PROD
react-dom-server.node.production.min.js	0.0%	-0.0%	17.74 KB	17.74 KB	6.83 KB	6.83 KB	NODE_PROD
react-dom-unstable-fizz.browser.development.js	0.0%	-0.1%	3.63 KB	3.63 KB	1.44 KB	1.44 KB	UMD_DEV
react-dom-unstable-fizz.browser.production.min.js	0.0%	-0.3%	1.21 KB	1.21 KB	707 B	705 B	UMD_PROD
react-dom-unstable-fizz.browser.development.js	0.0%	-0.1%	3.45 KB	3.45 KB	1.39 KB	1.39 KB	NODE_DEV
react-dom-unstable-fizz.browser.production.min.js	0.0%	-0.3%	1.05 KB	1.05 KB	639 B	637 B	NODE_PROD
react-dom-unstable-fizz.node.development.js	0.0%	-0.1%	3.7 KB	3.7 KB	1.42 KB	1.42 KB	NODE_DEV
react-dom-unstable-fizz.node.production.min.js	0.0%	-0.3%	1.1 KB	1.1 KB	669 B	667 B	NODE_PROD

react-art

File	Filesize Diff	Gzip Diff	Prev Size	Current Size	Prev Gzip	Current Gzip	ENV
react-art.development.js	+0.2%	+0.1%	517.92 KB	518.92 KB	114.39 KB	114.46 KB	UMD_DEV
react-art.production.min.js	0.0%	-0.0%	90.93 KB	90.93 KB	27.97 KB	27.97 KB	UMD_PROD
react-art.development.js	+0.2%	+0.1%	449.44 KB	450.45 KB	97.27 KB	97.34 KB	NODE_DEV
ReactART-dev.js	+0.3%	+0.2%	458.42 KB	459.73 KB	96.42 KB	96.59 KB	FB_WWW_DEV

react-native-renderer

File	Filesize Diff	Gzip Diff	Prev Size	Current Size	Prev Gzip	Current Gzip	ENV
ReactNativeRenderer-dev.js	+0.2%	+0.1%	582.92 KB	584.23 KB	126.97 KB	127.08 KB	RN_FB_DEV
ReactNativeRenderer-prod.js	0.0%	-0.0%	244.14 KB	244.14 KB	42.9 KB	42.9 KB	RN_FB_PROD
ReactNativeRenderer-dev.js	+0.2%	+0.1%	582.83 KB	584.14 KB	126.93 KB	127.04 KB	RN_OSS_DEV
ReactNativeRenderer-profiling.js	0.0%	-0.0%	233.19 KB	233.19 KB	40.91 KB	40.91 KB	RN_OSS_PROFILING
ReactFabric-dev.js	+0.2%	+0.1%	573.77 KB	575.08 KB	124.7 KB	124.81 KB	RN_FB_DEV
ReactFabric-prod.js	0.0%	-0.0%	237.34 KB	237.34 KB	41.45 KB	41.45 KB	RN_FB_PROD
ReactFabric-profiling.js	0.0%	-0.0%	242.64 KB	242.64 KB	42.77 KB	42.77 KB	RN_FB_PROFILING
ReactFabric-dev.js	+0.2%	+0.1%	573.68 KB	574.99 KB	124.66 KB	124.77 KB	RN_OSS_DEV

react-test-renderer

File	Filesize Diff	Gzip Diff	Prev Size	Current Size	Prev Gzip	Current Gzip	ENV
react-test-renderer.development.js	+0.2%	+0.1%	462.66 KB	463.66 KB	100.03 KB	100.1 KB	UMD_DEV
react-test-renderer.production.min.js	0.0%	-0.0%	57.31 KB	57.31 KB	17.61 KB	17.61 KB	UMD_PROD
react-test-renderer.development.js	+0.2%	+0.1%	457.62 KB	458.62 KB	98.8 KB	98.86 KB	NODE_DEV
ReactTestRenderer-dev.js	+0.3%	+0.2%	466.81 KB	468.12 KB	98.29 KB	98.46 KB	FB_WWW_DEV
react-test-renderer-shallow.development.js	0.0%	-0.0%	38.09 KB	38.09 KB	9.83 KB	9.83 KB	UMD_DEV
react-test-renderer-shallow.production.min.js	0.0%	-0.1%	10.56 KB	10.56 KB	3.25 KB	3.25 KB	UMD_PROD
react-test-renderer-shallow.development.js	0.0%	-0.0%	32.39 KB	32.39 KB	8.47 KB	8.46 KB	NODE_DEV
react-test-renderer-shallow.production.min.js	0.0%	-0.0%	11.2 KB	11.2 KB	3.49 KB	3.49 KB	NODE_PROD

react-reconciler

File	Filesize Diff	Gzip Diff	Prev Size	Current Size	Prev Gzip	Current Gzip	ENV
react-reconciler.development.js	+0.2%	+0.1%	447.27 KB	448.28 KB	95.78 KB	95.84 KB	NODE_DEV
react-reconciler.production.min.js	0.0%	-0.0%	57.07 KB	57.07 KB	17.07 KB	17.07 KB	NODE_PROD
react-reconciler-persistent.development.js	+0.2%	+0.1%	445.65 KB	446.65 KB	95.13 KB	95.19 KB	NODE_DEV
react-reconciler-persistent.production.min.js	0.0%	-0.0%	57.08 KB	57.08 KB	17.07 KB	17.07 KB	NODE_PROD
react-reconciler-reflection.development.js	0.0%	-0.0%	15.4 KB	15.4 KB	4.84 KB	4.83 KB	NODE_DEV
react-reconciler-reflection.production.min.js	0.0%	-0.1%	2.56 KB	2.56 KB	1.13 KB	1.13 KB	NODE_PROD

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