[Flight] Allow overriding request.timeOrigin via options.startTime

[lubieowoce]

Currently, IO that finished before the request started is not considered IO:

react/packages/react-server/src/ReactFlightServer.js

Lines 5338 to 5343 in 6a0ab4d

	const ioInfo = info.awaited;
	if (ioInfo.end <= request.timeOrigin) {
	// This was already resolved when we started this render. It must have been some
	// externally cached data. We exclude that information but we keep components and
	// awaits that happened inside this render but might have been deduped within the
	// render.

This leads to loss of debug info when a flight stream is deserialized and serialized again.
We can solve this by allowing "when the the request started" to be set to a point in the past, when the original stream started by doing

const startTime = performance.now() + performance.timeOrigin
// ... stuff happens and time passes...
ReactServer.renderToReadableStream(..., { startTime })

[react-sizebot]

Comparing: 5dad2b4...ddea9a9

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
oss-stable/react-dom/cjs/react-dom.production.js	=	6.84 kB	6.84 kB	=	1.88 kB	1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js	=	609.91 kB	609.91 kB	=	107.85 kB	107.85 kB
oss-experimental/react-dom/cjs/react-dom.production.js	=	6.84 kB	6.84 kB	=	1.88 kB	1.88 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js	=	675.84 kB	675.84 kB	=	118.81 kB	118.81 kB
facebook-www/ReactDOM-prod.classic.js	=	695.47 kB	695.47 kB	=	122.24 kB	122.24 kB
facebook-www/ReactDOM-prod.modern.js	=	685.85 kB	685.85 kB	=	120.63 kB	120.63 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-flight-server.production.js	+1.80%	2.44 kB	2.49 kB	+0.98%	0.81 kB	0.82 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-flight-server.production.js	+1.80%	2.44 kB	2.49 kB	+0.98%	0.81 kB	0.82 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-flight-server.production.js	+1.80%	2.44 kB	2.49 kB	+0.98%	0.81 kB	0.82 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-flight-server.development.js	+1.55%	3.10 kB	3.14 kB	+0.74%	0.95 kB	0.95 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-flight-server.development.js	+1.55%	3.10 kB	3.14 kB	+0.74%	0.95 kB	0.95 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-flight-server.development.js	+1.55%	3.10 kB	3.14 kB	+0.74%	0.95 kB	0.95 kB

Generated by 🚫 dangerJS against ddea9a9

[lubieowoce]

drive-by fix. detecting only numbers would make Component1 look like a source location.