08a4f10ee7
This commit transforms the setClassMetadata calls generated by ngtsc from:
```typescript
/*@__PURE__*/ setClassMetadata(...);
```
to:
```typescript
/*@__PURE__*/ (function() {
setClassMetadata(...);
})();
```
Without the IIFE, terser won't remove these function calls because the
function calls have arguments that themselves are function calls or other
impure expressions. In order to make the whole block be DCE-ed by terser,
we wrap it into IIFE and mark the IIFE as pure.
It should be noted that this change doesn't have any impact on CLI* with
build-optimizer, which removes the whole setClassMetadata block within
the webpack loader, so terser or webpack itself don't get to see it at
all. This is done to prevent cross-chunk retention issues caused by
webpack's internal module registry.
* actually we do expect a short-term size regression while
https://github.com/angular/angular-cli/pull/16228
is merged and released in the next rc of the CLI. But long term this
change does nothing to CLI + build-optimizer configuration and is done
primarly to correct the seemingly correct but non-function PURE annotation
that builds not using build-optimizer could rely on.
PR Close #33337
68 lines
1.6 KiB
JSON
68 lines
1.6 KiB
JSON
{
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"cli-hello-world": {
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"master": {
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"uncompressed": {
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"runtime-es2015": 1485,
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"main-es2015": 141575,
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"polyfills-es2015": 36808
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}
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}
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},
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"cli-hello-world-ivy-minimal": {
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"master": {
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"uncompressed": {
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"runtime-es2015": 1485,
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"main-es2015": 15267,
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"polyfills-es2015": 36808
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}
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}
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},
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"cli-hello-world-ivy-compat": {
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"master": {
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"uncompressed": {
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"runtime-es2015": 1485,
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"main-es2015": 147719,
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"polyfills-es2015": 36808
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}
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}
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},
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"cli-hello-world-ivy-i18n": {
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"master": {
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"uncompressed": {
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"runtime-es2015": 1485,
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"main-es2015": 138032,
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"polyfills-es2015": 37494
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}
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}
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},
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"cli-hello-world-lazy": {
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"master": {
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"uncompressed": {
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"runtime-es2015": 2289,
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"main-es2015": 312772,
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"polyfills-es2015": 36808,
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"5-es2015": 751
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}
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}
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},
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"cli-hello-world-lazy-rollup": {
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"master": {
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"uncompressed": {
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"runtime-es2015": 2289,
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"main-es2015": 227998,
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"polyfills-es2015": 36808,
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"5-es2015": 779
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}
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}
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},
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"hello_world__closure": {
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"master": {
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"uncompressed": {
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"bundle": "TODO(i): temporarily increase the payload size limit from 105779 - this is due to a closure issue related to ESM reexports that still needs to be investigated",
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"bundle": "TODO(i): we should define ngDevMode to false in Closure, but --define only works in the global scope.",
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"bundle": 177447
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}
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}
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}
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}
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