Small code improvements

[shuding]

Two small things noticed today. When calling getDependencies concurrently (which is happening right now) the cache doesn't work as it's after the await, so here we move it to cache the promise instead. Also NUM_OF_MICROSEC_IN_SEC isn't accurate and it should be NANOSEC actually.

Bug

• Related issues linked using fixes #number
• Integration tests added
• Errors have helpful link attached, see contributing.md

Feature

• Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
• Related issues linked using fixes #number
• Integration tests added
• Documentation added
• Telemetry added. In case of a feature if it's used or not.
• Errors have helpful link attached, see contributing.md

Documentation / Examples

• Make sure the linting passes by running yarn lint
• The examples guidelines are followed from our contributing doc

[ijjk]

Stats from current PR

Default Build (Decrease detected ✓)

General Overall increase ⚠️

	vercel/next.js canary	shuding/next.js shu/f944	Change
buildDuration	20.3s	20.1s	-186ms
buildDurationCached	7.7s	8.1s	⚠️ +486ms
nodeModulesSize	626 MB	626 MB	⚠️ +118 B

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	shuding/next.js shu/f944	Change
/ failed reqs	0	0	✓
/ total time (seconds)	5.196	5.239	⚠️ +0.04
/ avg req/sec	481.13	477.2	⚠️ -3.93
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	2.074	2.085	⚠️ +0.01
/error-in-render avg req/sec	1205.66	1199.15	⚠️ -6.51

Client Bundles (main, webpack)

	vercel/next.js canary	shuding/next.js shu/f944	Change
925.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42 kB	42 kB	✓
main-HASH.js gzip	29.2 kB	29.2 kB	✓
webpack-HASH.js gzip	1.54 kB	1.54 kB	✓
Overall change	73 kB	73 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	shuding/next.js shu/f944	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	shuding/next.js shu/f944	Change
_app-HASH.js gzip	1.36 kB	1.36 kB	✓
_error-HASH.js gzip	193 B	193 B	✓
amp-HASH.js gzip	308 B	308 B	✓
css-HASH.js gzip	327 B	327 B	✓
dynamic-HASH.js gzip	2.71 kB	2.71 kB	✓
head-HASH.js gzip	359 B	359 B	✓
hooks-HASH.js gzip	920 B	920 B	✓
image-HASH.js gzip	5.74 kB	5.74 kB	✓
index-HASH.js gzip	263 B	263 B	✓
link-HASH.js gzip	2.65 kB	2.65 kB	✓
routerDirect..HASH.js gzip	320 B	320 B	✓
script-HASH.js gzip	391 B	391 B	✓
withRouter-HASH.js gzip	318 B	318 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	16 kB	16 kB	✓

Client Build Manifests

	vercel/next.js canary	shuding/next.js shu/f944	Change
_buildManifest.js gzip	459 B	459 B	✓
Overall change	459 B	459 B	✓

Rendered Page Sizes

	vercel/next.js canary	shuding/next.js shu/f944	Change
index.html gzip	533 B	533 B	✓
link.html gzip	546 B	546 B	✓
withRouter.html gzip	528 B	528 B	✓
Overall change	1.61 kB	1.61 kB	✓

---

Default Build with SWC (Increase detected ⚠️)

General Overall increase ⚠️

	vercel/next.js canary	shuding/next.js shu/f944	Change
buildDuration	24s	24.5s	⚠️ +470ms
buildDurationCached	8.2s	7.9s	-223ms
nodeModulesSize	626 MB	626 MB	⚠️ +118 B

Page Load Tests Overall increase ✓

	vercel/next.js canary	shuding/next.js shu/f944	Change
/ failed reqs	0	0	✓
/ total time (seconds)	5.477	5.471	-0.01
/ avg req/sec	456.45	456.95	+0.5
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	2.21	2.165	-0.04
/error-in-render avg req/sec	1131.43	1154.73	+23.3

Client Bundles (main, webpack)

	vercel/next.js canary	shuding/next.js shu/f944	Change
925.HASH.js gzip	178 B	178 B	✓
framework-HASH.js gzip	42.7 kB	42.7 kB	✓
main-HASH.js gzip	29.7 kB	29.7 kB	✓
webpack-HASH.js gzip	1.54 kB	1.54 kB	✓
Overall change	74 kB	74 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	shuding/next.js shu/f944	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	shuding/next.js shu/f944	Change
_app-HASH.js gzip	1.35 kB	1.35 kB	✓
_error-HASH.js gzip	179 B	179 B	✓
amp-HASH.js gzip	311 B	311 B	✓
css-HASH.js gzip	324 B	324 B	✓
dynamic-HASH.js gzip	2.9 kB	2.9 kB	✓
head-HASH.js gzip	357 B	357 B	✓
hooks-HASH.js gzip	920 B	920 B	✓
image-HASH.js gzip	5.84 kB	5.84 kB	✓
index-HASH.js gzip	261 B	261 B	✓
link-HASH.js gzip	2.78 kB	2.78 kB	✓
routerDirect..HASH.js gzip	322 B	322 B	✓
script-HASH.js gzip	392 B	392 B	✓
withRouter-HASH.js gzip	317 B	317 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	16.4 kB	16.4 kB	✓

Client Build Manifests

	vercel/next.js canary	shuding/next.js shu/f944	Change
_buildManifest.js gzip	458 B	458 B	✓
Overall change	458 B	458 B	✓

Rendered Page Sizes

	vercel/next.js canary	shuding/next.js shu/f944	Change
index.html gzip	533 B	533 B	✓
link.html gzip	547 B	547 B	✓
withRouter.html gzip	529 B	529 B	✓
Overall change	1.61 kB	1.61 kB	✓

Commit: 26b7934