perf: make functions common for reduce code size

[yusukebe]

This PR reduces the bundle code size with common functions that can't be minified with the bundler.

Created the following functions:

• createEmptyRecord
• createResponse

And applied to the core files. I think we don't have to optimize unrelated to the core like under src/middleware now.

The author should do the following, if applicable

• Add tests
• Run tests
• bun run format:fix && bun run lint:fix to format the code
• Add TSDoc/JSDoc to document the code

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.66%. Comparing base (4eb7979) to head (0fcb7ff).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4111      +/-   ##
==========================================
+ Coverage   91.31%   91.66%   +0.35%     
==========================================
  Files         168      169       +1     
  Lines       10790    10692      -98     
  Branches     3067     3055      -12     
==========================================
- Hits         9853     9801      -52     
+ Misses        936      890      -46     
  Partials        1        1              

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[github-actions]

Bundle size check

	main (4eb7979)	#4111 (95cbc44)	+/-
Bundle Size (B)	18,979B	18,629B	-350B
Bundle Size (KB)	18.53K	18.19K	-0.34K

Compiler Diagnostics (tsc)

	main (4eb7979)	#4111 (95cbc44)	+/-
Files	261	262	1
Lines	116,440	116,452	12
Identifiers	114,437	114,436	-1
Symbols	259,899	259,917	18
Types	162,567	162,569	2
Instantiations	3,039,293	3,039,293	0
Memory used	272,781K	273,082K	301K
I/O read	0.03s	0.02s	-0.01s
I/O write	0s	0s	0s
Parse time	0.68s	0.65s	-0.03s
Bind time	0.28s	0.28s	0s
Check time	4.04s	3.78s	-0.26s
Emit time	0s	0s	0s
Total time	5s	4.72s	-0.28s

---

Reported by octocov

[github-actions]

Bundle size check

	main (4eb7979)	#4111 (95cbc44)	+/-
Bundle Size (B)	18,979B	18,629B	-350B
Bundle Size (KB)	18.53K	18.19K	-0.34K

Compiler Diagnostics (typescript-go)

	main (4eb7979)	#4111 (95cbc44)	+/-
Files	231	232	1
Lines	106,339	106,351	12
Identifiers	106,177	106,176	-1
Symbols	371,550	351,269	-20,281
Types	292,987	286,488	-6,499
Instantiations	3,568,485	3,545,794	-22,691
Memory used	229,637K	221,216K	-8,421K
Memory allocs	10,003,491	9,944,001	-59,490
Parse time	0.071s	0.066s	-0.005s
Bind time	0.031s	0.02s	-0.011s
Check time	1.391s	1.478s	0.087s
Emit time	0s	0s	0s
Total time	1.504s	1.565s	0.061s

---

Reported by octocov

[yusukebe]

Hey @EdamAme-x

Do you think merging this PR is worth it? If so, please review this.

[yusukebe]

Hello @usualoma !

What do you think of this optimization?

[usualoma]

Hi @yusukebe.
Thank you!

If you ask me if it's really necessary, I'd say it's a gray area, but I don't think it will reduce maintainability, so it's fine.

[yusukebe]

@usualoma

Thanks! I also think this is a "gray area". I'll decide whether to merge later.