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89 Commits

Author SHA1 Message Date
Austaras
ff1ad95b59
feat(es/minifier): Compress common sub expressions in sequences (#7587) 2023-07-04 05:47:37 +00:00
Donny/강동윤
47d2edd4dc
feat(es/minifier): Drop unused properties (#7534) 
**Related issue:**

 - Closes #7472.
 2023-07-04 05:11:33 +00:00
David Sherret
064bcf4854
fix(es/codegen): Remove extra spaces in AssignPatProp and KeyValuePatProp (#7488) 
Co-authored-by: Donny/강동윤 <kdy1997.dev@gmail.com>
 2023-06-07 05:08:35 +00:00
Austaras
62075faeaa
feat(es/minifier): Remove unused labels (#7478) 2023-06-07 04:23:40 +00:00
Austaras
5dbbbea2ef
fix(es/minifier): Mark all function params as potential property mutation (#7409) 
**Description:**

This issue is more severe than I originally thought. It raises not in
array indexing, but in function calls and property mutation. We should
treat all function arguments as potentially be property mutated,
otherwise following example

```js
class A {
	a = 1

	toString() {
		return this.a
	}
}

const a = new A()

function foo(x) {
	x.a++
}

const b = a + 1

foo(a)

console.log(b)
```

would be error(It should log 2, but logs 3 after compress).

As the result, massive regressions is unavoidable, since some of these
optimizations may indeed cause error. Part of them can be mitigated with
following optimization -- allow inline of ident even if its original
value is mutated. Consider

```js
export function foo(x) {
   const y = x
   x.a = 1
   y.b = 2
}
```

If x is a primitive value, all mutations to its properties are ignored;
if x is a object, then y refers to the same object no matter what
mutation is performed.

And there's still room for more, currently following code
```js
export function foo(x) {
    const y = Math.floor(x);
    g(y);
}
```
But I'd rather do it in a separate PR.


**Related issue:**

 - Closes #7402.
 2023-05-18 01:19:17 +00:00
Donny/강동윤
0259a7465f
build(cargo): Update rustc to nightly-2023-03-20 (#7170) 
**Description:**

This PR also updates `rkyv` to `=0.7.40`.

**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/6807.
 2023-03-30 08:06:02 +00:00
Donny/강동윤
12546c853a
build(cargo): Revert rustc upgrade (#7162) 
**Description:**

The `rkyv` bug is not fixed.
 2023-03-29 17:48:45 +09:00
Donny/강동윤
e445502072
build(cargo): Update rustc to nightly-2023-03-28 (#7154) 
**Description:**

This PR also updates `rkyv` to `=0.7.40`.

**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/6807.
 2023-03-29 06:24:19 +00:00
Anders Kaseorg
493a4f7042
fix(es/minifier): Remove wrong optimization of new RegExp(…) (#7091) 2023-03-17 03:22:02 +00:00
Austaras
06cbb9002d
feat(es/minifier): Optimize calls to Boolean/Number/String/Symbol (#7006) 2023-03-04 04:14:14 +00:00
magic-akari
9382bda786
fix(es/minifier): Fix toFixed, toPrecision, toExponential and toString of Number (#6960) 2023-02-19 23:18:14 +09:00
HeYunfei
a1ccc8afdf
feat(es/minifier): Make name mangler understand block scoping (#6670) 
**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/5090.
 - Closes https://github.com/swc-project/swc/issues/5766.
 2023-01-06 03:14:10 +00:00
Donny/강동윤
743a1aab4f
feat(es/minfiier): Compute more with sequential inliner (#6169) 2022-10-27 00:50:52 +00:00
Austaras
1cd7f617f9
feat(es/minifier): Inline a lazily initialized var if it's used once (#6237) 2022-10-26 06:02:22 +00:00
Donny/강동윤
842abd4575
fix(es/minifier): Remove wrong rule (#6201) 
**Related issue:**

 - https://github.com/vercel/next.js/issues/41527.
 2022-10-19 02:14:38 +00:00
Donny/강동윤
f2e8f98d38
feat(es/minifier): Skip function declarations in sequential inliner (#6147) 2022-10-18 02:51:05 +00:00
Austaras
b40d486253
fix(es/minifier): Consider function body cost while inlining function (#5342) 2022-10-15 05:47:56 +00:00
Donny/강동윤
6d0ca05cb5
fix(es/minifier): Fix ordering issue of analyzer (#6150) 
**Description:**

This is the groundwork for a parallel analyzer. This PR fixes the ordering issue of the analyzer so that the analyzer works identically regardless of the visit order. This patch contains some improvements because previously, we mixed `.and_modify()` and `.or_default()`.
 2022-10-15 04:37:11 +00:00
Donny/강동윤
3d271e82a2
fix(es/minifier): Preserve return values of recursive IIFE (#6142) 
**Description:**

This PR fixes the logic for dropping return values of IIFE.

**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/6141.
 2022-10-14 09:32:56 +09:00
Donny/강동윤
c37839fc62
feat(es/minifier): Swap more binary expressions (#6134) 2022-10-13 03:45:05 +00:00
Donny/강동윤
ad960c76c0
feat(es/minifier): Detect type of .length (#6120) 
**Description:**

This PR updates minifier to detect the type of `xxx.length` if possible.
 2022-10-11 23:06:58 +00:00
Donny/강동윤
9ce3df091f
feat(es/minifier): Distinguish calls in alias analyzer (#6080) 
**Description:**

This PR improves the alias analyzer by distinguishing call and reference, thus reducing the number of identifiers.

---

Co-authored-by: Justin Ridgewell <justin@ridgewell.name>
 2022-10-08 03:15:18 +00:00
Austaras
c9427f1ec4
fix(es/minifier): Improve infection analysis (#6044) 2022-10-06 18:12:09 +09:00
Donny/강동윤
d65fba134d
fix(es/minifier): Fix infection analysis of sequential inliner (#6053) 
**Description:**

This PR fixes the callee issue by fixing the infection analyzer.

**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/6047
 2022-10-06 02:46:22 +00:00
Austaras
c4850997a2
feat(es/minifier): Inline vars initialized before the declaration (#6027) 2022-10-03 08:58:38 +00:00
Donny/강동윤
2b627524ac
feat(es/minifier): Ignore return values of ignored IIFEs (#6020) 
**Description:**

As we are not using the return value of the function, we can call `ignore_return_value` on the argument of the return statements of IIFE.
 2022-10-02 20:01:56 +09:00
Austaras
61807abf6e
feat(es/minifier): Inline function calls in more cases (#6010) 2022-10-01 18:18:45 +09:00
Donny/강동윤
aeb7f300a8
feat(es/minifier): Invoke sequential inliner for inlined IIFEs (#5991) 
**Description:**

Inlined IIFEs have the exact pattern sequential inliner wants, so it's good to invoke it.
 2022-09-29 11:03:06 +00:00
Donny/강동윤
f8358fbe2b
fix(es/minifier): Remove wrong variable joiner pass (#5992) 
**Description:**

We had two passes for joining variables. This PR removes one in the full optimizer, which is wrong.

**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/5989.
 2022-09-29 19:11:18 +09:00
Donny/강동윤
8c4873f81e
test(es/minifier): Remove mangle-only snapshots (#5979) 
**Description:**

We don't have to store snapshots of all fixtures.
 2022-09-28 21:35:52 +09:00
Donny/강동윤
97647861bf
fix(es/minifier): Track aliasing via assignments (#5940) 2022-09-23 14:22:41 +09:00
Donny/강동윤
93964a82ea
test(es/minifier): Remove analysis snapshot (#5939) 
**Description:**

This PR removes analysis snapshots as it disturbs code review process
 2022-09-23 13:14:42 +09:00
Donny/강동윤
7bcaaef4f7
feat(es/minifier): Mangle labels (#5934) 
**Description:**

This PR adds code to mangle labels.
 2022-09-22 23:24:05 +09:00
Donny/강동윤
e9c704182b
feat(es/minifier): Improve analysis of reassignments (#5931) 2022-09-22 10:22:18 +00:00
Donny/강동윤
e303f7e853
fix(es/minifier): Fix analysis of assignments (#5924) 
**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/5910
 2022-09-21 11:33:25 +00:00
Donny/강동윤
a9873e505d
perf(es/minifier): Optimize analyzer (#5908) 2022-09-20 08:21:39 +00:00
IWANABETHATGUY
7d6d04b421
fix(es/codegen): Drop the last comma in an array literal (#5877) 
**Description:**

Drop the last comma in an array literal.

**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/5692.
 2022-09-16 15:48:28 +09:00
Alexander Akait
7f62fa6227
perf(html): Reduce memory usage (#5867) 2022-09-15 04:17:05 +00:00
Austaras
63fb0c4ad3
feat(es/minifier): Move assign with seq init into seq (#5847) 2022-09-14 12:57:18 +00:00
Alexander Akait
ccd618ce54
perf(html/minifier): Improve performance (#5838) 2022-09-13 14:01:41 +09:00
Austaras
8567a38c4a
feat(es/minifier): Extend inlining of identifiers to multi-usage (#5832) 2022-09-13 03:52:47 +00:00
Donny/강동윤
7391cc99b1
perf(css/minifier): Use JsWord instead of &str (#5806) 2022-09-10 07:20:51 +00:00
Austaras
ee26337a25
feat(es/minifier): Inline lazily initialized variables (#5737) 
Safety:

For a function-local variable, an expression with side-effects would be a call, including an indirect one with a member expression.

 - If the call is function-local, it will be analyzed by the analyzer and inliner will not work.
 - If the call is not a function-local one, it cannot modify the local variable.
 2022-09-08 08:07:43 +00:00
Donny/강동윤
24b60d2b64
feat(es/minifier): Change order of renaming to align with terser (#5780) 
**Description:**

 - Change the order of renaming to match one of `terser`.
 2022-09-08 05:23:23 +00:00
Donny/강동윤
32a73fbf22
fix(es/minifier): Fix calculation of character frequency (#5772) 2022-09-07 04:46:21 +00:00
Austaras
90852f5aa6
fix(es/minifier): Fix analysis of assignments and classes (#5770) 2022-09-07 03:51:42 +00:00
Donny/강동윤
60ce462215
feat(es/minifier): Align name mangler with terser (#5763) 2022-09-06 21:37:58 +09:00
Austaras
5b2d024788
feat(es/minifier): Relax requirement for IIFE invokation (#5721) 2022-09-03 07:33:31 +00:00
Austaras
4ef99f346b
feat(es/minifier): Relax function inline requirement (#5607) 2022-09-01 19:36:16 +09:00
Donny/강동윤
217f519940
feat(es/minifier): Ignore closure in initializer from sequential inliner (#5702) 2022-08-31 10:33:22 +00:00