feat(server + client): streaming mutations and queries over HTTP

[KATT]

• Closes feat: Streaming Mutations / Queries #4477
• Closes feat: add experimental support for iterators and streams #4911
• Ref Consider SSE to enable server->client http subscriptions #544 (this PR is not SSE but long-running stuff over HTTP at least)

🎯 Changes

• Replace httpBatchStreamLink with an implementation that also handles async generators and deferred promise
• Colocate the serializer and deserialize so it's not spread across @trpc/client and @trpc/server
• it's basically a simplified variant of tupleson that should be easier to fit in with fewer edge-cases

Other stuff / notes

• I untangled some of the hornets' nest that is httpBatchStream / httpLink / httpBatchStreamLink - the functionality was way too generic and I've made each link a bit more dumb
• Updated docs
  • https://www-git-05-01-stream-trpc.vercel.app/docs/migrate-from-v10-to-v11#reverse-chronological-changelog
  • https://www-git-05-01-stream-trpc.vercel.app/docs/client/links/httpBatchStreamLink#generators
• We should probably add support for generators in subscriptions too (done in feat(server + client): add support for server-sent events (SSE) #5713)
• Not tested too much - especially around cancellations and stream backpressure etc

[github-actions]

Diagnostics Comparison

Numbers

Metric	PR	next
Files	798	798 (➖ 0)
Lines of Library	40,640	40,640 (➖ 0)
Lines of Definitions	120,184	120,086 (🔺 98)
Lines of TypeScript	4,967	4,967 (➖ 0)
Lines of JavaScript	0	0 (➖ 0)
Lines of JSON	0	0 (➖ 0)
Lines of Other	0	0 (➖ 0)
Identifiers	175,981	175,837 (🔺 144)
Symbols	109,421	109,350 (🔺 71)
Types	89	89 (➖ 0)
Instantiations	0	0 (➖ 0)
Memory used	174,212	177,313 (🔽🟢 -3,101)
Assignability cache size	0	0 (➖ 0)
Identity cache size	0	0 (➖ 0)
Subtype cache size	0	0 (➖ 0)
Strict subtype cache size	0	0 (➖ 0)

Timings and averages

Metric	PR	next
max (s)	4.353	4.314 (🔺 0.04)
min (s)	4.353	4.314 (🔺 0.04)
avg (s)	4.353	4.314 (🔺 0.04)
median (s)	4.353	4.314 (🔺 0.04)
length	1	1 (➖ 0)

unstable timings

Unstable

Timings are not reliable in here

Metric	PR	next
I/O Read time	0.05	0.04 (🔺 0.01)
Parse time	0.7	0.72 (🔽🟢 -0.02)
ResolveTypeReference time	0.03	0.03 (➖ 0)
ResolveModule time	0.11	0.1 (🔺 0.01)
ResolveLibrary time	0.01	0.02 (🔽🟢 -0.01)
Program time	1.02	1.04 (🔽🟢 -0.02)
Bind time	0.42	0.41 (🔺 0.01)
Total time	1.43	1.45 (🔽🟢 -0.02)

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
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trpc-sse	❌ Failed (Inspect)			May 19, 2024 4:08pm
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[github-actions]

This pull request has been locked because we are very unlikely to see comments on closed issues. If you think, this PR is still necessary, create a new one with the same branch. Thank you.