build(tsc): Refactor emotion types so we use less memory

[BYK]

This patch essentially back-ports emotion-js/emotion#1501 to dramatically
reduce the number of types generated during compilation. This reduces
the number of types from ~700k to ~200k which translates to more than 50%
reduction in type check time and memory consumption.

Using the command tsc --noEmit --extendedDiagnostics

Metric	Before	After
Files	1189	1189
Lines	484378	484571
Nodes	892394	893030
Identifiers	296394	296638
Symbols	769880	719992
Types	705230	202553
Memory used	1024710K	747802K
Assignability cache size	576214	382608
Identity cache size	7697	6167
Subtype cache size	18326	18307
I/O Read time	0.36s	0.30s
Parse time	2.13s	1.76s
Program time	4.28s	3.48s
Bind time	1.25s	0.94s
Check time	40.85s	16.66s
Total time	46.38s	21.09s

[billyvg]

How confident are we that this will fix the node OOM errors? We were having them before upgrading to emotion@10 fwiw.

[BYK]

How confident are we that this will fix the node OOM errors? We were having them before upgrading to emotion@10 fwiw.

I've removed the memory increase flags so CI will tell us. This almost halves the memory, at least it was like that last time I tried but the numbers I but here are more modest. I am still quite hopeful :)

[BYK]

Ehh, I guess Jest still consumes a lot of memory. I think we can still remove the other memory extension flags though, what do you think @billyvg? I don't get any memory issues when compiling locally. Do you?

[billyvg]

We should keep them, we added it because people were having these memory issues

[BYK]

@billyvg looks like we're good now?

[dashed]

Woah. Impressive stat numbers! 👏

[dashed]

I'm able to confirm the stats locally on my dev.

$ yarn tsc --noEmit --extendedDiagnostics
yarn run v1.21.1
$ /Users/me/aaa/sentry/sentry/node_modules/.bin/tsc --noEmit --extendedDiagnostics
Files:                       1189
Lines:                     484330
Nodes:                     892184
Identifiers:               296331
Symbols:                   769426
Types:                     705062
Memory used:              980746K
Assignability cache size:  576190
Identity cache size:         7681
Subtype cache size:         18223
I/O Read time:              0.22s
Parse time:                 1.48s
Program time:               2.54s
Bind time:                  0.85s
Check time:                36.74s
Total time:                40.13s
✨  Done in 40.97s.

$ yarn tsc --noEmit --extendedDiagnostics
yarn run v1.21.1
$ /Users/me/aaa/sentry/sentry/node_modules/.bin/tsc --noEmit --extendedDiagnostics
Files:                       1189
Lines:                     484527
Nodes:                     892820
Identifiers:               296575
Symbols:                   719203
Types:                     202410
Memory used:              759936K
Assignability cache size:  382602
Identity cache size:         6173
Subtype cache size:         18204
I/O Read time:              0.23s
Parse time:                 1.73s
Program time:               2.96s
Bind time:                  0.94s
Check time:                15.61s
Total time:                19.51s
✨  Done in 20.40s.

I used the command: yarn tsc --noEmit --extendedDiagnostics

[dashed]

Looks good to me 👍

[billyvg]

Thanks for fixing this! Types seem to be still working and build times are definitely better.

[priscilawebdev]

Good job 👏