angular-docs-cn/packages/compiler-cli/ngcc/test/integration
Pete Bacon Darwin c65ac7fbad perf(ivy): ngcc - exit early if the targeted package has been compiled (#29740)
Previously we always walked the whole folder tree looking for
entry-points before we tested whether a target package had been
processed already. This could take >10secs!

This commit does a quick check of the target package before doing
the full walk which brings down the execution time for ngcc in this
case dramatically.

```
$ time ./node_modules/.bin/ivy-ngcc -t @angular/common/http/testing
Compiling @angular/core : fesm2015 as esm2015
Compiling @angular/core : fesm5 as esm5
Compiling @angular/core : esm2015 as esm2015
Compiling @angular/core : esm5 as esm5
Compiling @angular/common/http : fesm2015 as esm2015
Compiling @angular/common/http : fesm5 as esm5
Compiling @angular/common/http : esm2015 as esm2015
Compiling @angular/common/http : esm5 as esm5
Compiling @angular/common/http/testing : fesm2015 as esm2015
Compiling @angular/common/http/testing : fesm5 as esm5
Compiling @angular/common/http/testing : esm2015 as esm2015
Compiling @angular/common/http/testing : esm5 as esm5

real	0m19.766s
user	0m28.533s
sys	0m2.262s
```

```
$ time ./node_modules/.bin/ivy-ngcc -t @angular/common/http/testing
The target entry-point has already been processed

real	0m0.666s
user	0m0.605s
sys	0m0.113s
```

PR Close #29740
2019-04-08 09:48:20 -07:00
..
ngcc_spec.ts perf(ivy): ngcc - exit early if the targeted package has been compiled (#29740) 2019-04-08 09:48:20 -07:00