This CL updates the frontend_server to allow specifying what dill
file to initialize from.
Normally, it tries to initialize from the same dill file as is the
output. This is fine in many cases (e.g. flutter run always says it
should output to build/app.dill): The first time it compiles
everything, subsequent times (across restarts) it only recompiles
what's needed.
When running tests, however, the output is in a temporary directory,
so it doesn't work across restarts. The startup time for tests is
always rather high, because it always has to recompile everything.
This CL updates the frontend_server to allow specifying what dill
file to initialize from. Flutter can thus save the compiled test
file in a centralized location (e.g. build/test.dill) and load from
that across restarts.
Plumbing this into flutter yields the following result, when running
a single test (the one automatically created when creating a new
flutter project):
Before: ~5.5 seconds
Now, first run: ~5.5 second (unchanged)
Now, subsequent runs: ~3.4 seconds
Approximate breakdown:
Startup cost (e.g. if there's no test directory): ~ 800 ms
Starting up the actual frontend server: ~150 ms
Reading source from old dill, loading all relevant files
and invalidating source: ~ 300 ms
Compiling everything (or, rather, nothing as it's all
from the dill at this point): ~ 650 ms
Serializing: ~ 250 ms
Copying files: ~ 50 ms
Running the actual test: ~1100 ms
Total: ~3300 ms
`time flutter test --local-engine=host_debug --preview-dart-2`
says ~3.4 seconds...
To compare, --no-preview-dart-2 takes ~2.2 seconds,
so dart2 still has a (significantly) higher startup cost.
Moves the needle on https://github.com/flutter/flutter/issues/15767.
Change-Id: I36a2d05bc76e0193d369df42eb3b9f08416dd78f
Reviewed-on: https://dart-review.googlesource.com/51820
Reviewed-by: Kevin Millikin <kmillikin@google.com>
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
Commit-Queue: Jens Johansen <jensj@google.com>
Second try. First try was reverted because a previously empty URL (the
default 'always there' one) is now a null url instead, which wasn't
handled properly in the frontend_server.
See 47e9039512 for original details.
This reverts commit 4c9b712052.
Change-Id: I717eb927cbe29b6388e72f7e270428d234d44e4d
Reviewed-on: https://dart-review.googlesource.com/53580
Commit-Queue: Jens Johansen <jensj@google.com>
Reviewed-by: Peter von der Ahé <ahe@google.com>
This change adds experimental option '--import-dill' to front-end server
to specify existing kernel file to import when compiling a new one.
Newly generated kernel file will depend on the imported one and will
omit libraries available in the imported dill file, as well as platform
libraries.
Caveat: the new option is not compatible with '--incremental'.
Change-Id: Id637908afdb12f1829e5f634251fa9ad82676baf
Reviewed-on: https://dart-review.googlesource.com/54309
Reviewed-by: Alexander Aprelev <aam@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
This allows frontend-server users(flutter) to do quick check whether frontend compilation reported errors as it produced output kernel file.
Change-Id: I6e4da8fac33104968eb7720200a1b7153ec8f3de
Reviewed-on: https://dart-review.googlesource.com/51000
Reviewed-by: Siva Annamalai <asiva@google.com>
Commit-Queue: Alexander Aprelev <aam@google.com>
This is the second attempt at this change.
The original try was committed as f9c7a4a22d.
The revert of that was committed as 2f68e82526.
This CL allows users of the incremental compiler to ask for a computeDelta
call to include the full Component in the output,
basically turning the incremental compiler into a batch compiler.
This CL furthermore changes the frontend_server (in pkg/vm) to use this
functionality.
This change - used in flutter - takes the time it takes to run
`flutter test` in `packages/flutter` from ~8 minutes 30 seconds to
~2 minutes 30 seconds (on my machine).
Fixes#32663.
Change-Id: I073e77b3596b33a24cabcfbcedf97bb0be7aa450
Reviewed-on: https://dart-review.googlesource.com/49125
Commit-Queue: Jens Johansen <jensj@google.com>
Reviewed-by: Peter von der Ahé <ahe@google.com>
This reverts commit f9c7a4a22d.
Reason for revert: This CL breaks the restart functionality in Flutter, when we restart we end up with an empty app.dill file (60 bytes).
Original change's description:
> Allow to output full component via computeDelta
>
> This CL allows users of the incremental compiler to ask for a computeDelta
> call to include the full Component in the output,
> basically turning the incremental compiler into a batch compiler.
>
> This CL furthermore changes the frontend_server (in pkg/vm) to use this
> functionality.
>
> This change - used in flutter - takes the time it takes to run
> `flutter test` in `packages/flutter` from ~8 minutes 30 seconds to
> ~2 minutes 30 seconds (on my machine).
>
> Change-Id: Ia185d28da1f97b0be5dad8814cd01a8f13482724
> Reviewed-on: https://dart-review.googlesource.com/47020
> Commit-Queue: Jens Johansen <jensj@google.com>
> Reviewed-by: Peter von der Ahé <ahe@google.com>
> Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
TBR=ahe@google.com,vegorov@google.com,jensj@google.com
Change-Id: I5ff39f9d78319413f4bbb7800e24bf27ab4ada9c
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://dart-review.googlesource.com/48240
Reviewed-by: Siva Annamalai <asiva@google.com>
Commit-Queue: Siva Annamalai <asiva@google.com>
This CL allows users of the incremental compiler to ask for a computeDelta
call to include the full Component in the output,
basically turning the incremental compiler into a batch compiler.
This CL furthermore changes the frontend_server (in pkg/vm) to use this
functionality.
This change - used in flutter - takes the time it takes to run
`flutter test` in `packages/flutter` from ~8 minutes 30 seconds to
~2 minutes 30 seconds (on my machine).
Change-Id: Ia185d28da1f97b0be5dad8814cd01a8f13482724
Reviewed-on: https://dart-review.googlesource.com/47020
Commit-Queue: Jens Johansen <jensj@google.com>
Reviewed-by: Peter von der Ahé <ahe@google.com>
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
Incremental reload request can switch to new main source. Until this CL, it caused reset of current incremental kernel file name back to full kernel file name, which resulted in full kernel file having incremental kernel contents.
BUG=dartbug.com/32384
Change-Id: Ie5037f7d6316fa262065f9ca6485879d7ee15b28
Reviewed-on: https://dart-review.googlesource.com/44901
Commit-Queue: Siva Annamalai <asiva@google.com>
Reviewed-by: Jens Johansen <jensj@google.com>
Reviewed-by: Siva Annamalai <asiva@google.com>
Ryan Macnak