commit ac60f6b07e4ea923c7ff7c18036c1434fad85642
author Jens Johansen <jensj@google.com> Thu Jun 02 16:58:24 2022 +0000
committer Commit Bot <commit-bot@chromium.org> Thu Jun 02 16:58:24 2022 +0000
tree c6d7bba76f07d12f43ddfe0d3d00e05a0a1564de
parent 46c0695bf09ac8806bf5fafba532b3086e0d7bdd

[CFE] Don't serialize platform in suite

This takes running the weak suite - on my machine - from

```
[ 07:14 | 100.0% | + 2268 | -    0 ]: weak/variance/unconstrained_inference

             check errors: 0:00:00.517818 ms
stress constant evaluator: 0:00:00.748959 ms
                    print: 0:00:01.357741 ms
                typeCheck: 0:00:09.610927 ms
                   verify: 0:00:17.063594 ms
       match expectations: 0:00:17.186629 ms
                  compile: 0:00:56.952218 ms
      transform component: 0:01:23.143726 ms
                      run: 0:02:24.114175 ms
              write .dill: 0:04:07.470467 ms


real    7m19.983s
user    10m43.053s
sys     1m29.653s
```

to

```
[ 03:07 | 100.0% | + 2268 | -    0 ]: weak/variance/unconstrained_inference

             check errors: 0:00:00.521563 ms
stress constant evaluator: 0:00:00.760032 ms
                    print: 0:00:01.358365 ms
              write .dill: 0:00:02.451508 ms
                typeCheck: 0:00:09.750399 ms
                   verify: 0:00:17.081690 ms
       match expectations: 0:00:17.723327 ms
                  compile: 0:00:55.593688 ms
                      run: 0:01:11.893074 ms
      transform component: 0:01:21.368430 ms


real    3m12.619s
user    4m20.531s
sys     0m41.589s
```

Change-Id: I9d235e84d10df06737789e8765f3b55521697e21
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/246961
Reviewed-by: Johnni Winther <johnniwinther@google.com>
Commit-Queue: Jens Johansen <jensj@google.com>

pkg/front_end/test/utils/kernel_chain.dart

diff --git a/pkg/front_end/test/utils/kernel_chain.dart b/pkg/front_end/test/utils/kernel_chain.dart
index 93beea1..b0941a1 100644
--- a/pkg/front_end/test/utils/kernel_chain.dart
+++ b/pkg/front_end/test/utils/kernel_chain.dart
@@ -455,8 +455,28 @@
     ByteSink sink = new ByteSink();
     bool good = false;
     try {
-      // TODO(johnniwinther,jensj): Avoid serializing the sdk.
-      new BinaryPrinter(sink).writeComponentFile(component);
+      // Avoid serializing the sdk.
+      component.computeCanonicalNames();
+      Component userCode = new Component(
+          nameRoot: component.root,
+          uriToSource: new Map<Uri, Source>.from(component.uriToSource));
+      userCode.setMainMethodAndMode(
+          component.mainMethodName, true, component.mode);
+      for (Library library in component.libraries) {
+        if (library.importUri.isScheme("dart")) {
+          if (result.isUserLibrary(library)) {
+            // dart:test, test:extra etc as used will say yes to being a user
+            // library.
+          } else if (library.isSynthetic) {
+            // OK --- serialize that.
+          } else {
+            // Skip serialization of "real" platform libraries.
+            continue;
+          }
+        }
+        userCode.libraries.add(library);
+      }
+      new BinaryPrinter(sink).writeComponentFile(userCode);
       good = true;
     } catch (e, s) {
       return fail(result, e, s);