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emulator: Enable dex-preoptimization

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Backport from AOSP master.

This enables the Dex pre-optimization for emulator-specific builds.
The idea is to speed up the initial boot sequence of an SDK AVD by
avoiding the costly on-device preopt pass that is performed otherwise
the first time the AVD is launched.

Benchmarking shows reductions in first boot time from 1m30s to 40s
on a 2.4GHz Xeon when emulating the AOSP master ToT.

Change-Id: Ibf5ebe68aa4d363c9df05d2ffe7cb828ef99f922
Orig-Change-Id: I67a9ce9791220c202817864c6e83dc8fd9cbc027
This commit is contained in:
David 'Digit' Turner
2011-06-16 01:32:20 +02:00
committed by David 'Digit' Turner
parent 3248bb2e07
commit 4b65598642
2 changed files with 11 additions and 0 deletions
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6
target/board/generic/BoardConfig.mk
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@@ -27,3 +27,9 @@ BOARD_USES_GENERIC_AUDIO := true
# no hardware camera # no hardware camera
USE_CAMERA_STUB := true USE_CAMERA_STUB := true
# Enable dex-preoptimization to speed up the first boot sequence
# of an SDK AVD. Note that this operation only works on Linux for now
ifeq ($(HOST_OS),linux)
WITH_DEXPREOPT := true
endif

5
target/board/generic_x86/BoardConfig.mk
View File

@@ -21,3 +21,8 @@ USE_CAMERA_STUB := true
# Set /system/bin/sh to mksh, not ash, to test the transition. # Set /system/bin/sh to mksh, not ash, to test the transition.
TARGET_SHELL := mksh TARGET_SHELL := mksh
# Enable dex-preoptimization to speed up the first boot sequence
# of an SDK AVD. Note that this operation only works on Linux for now
ifeq ($(HOST_OS),linux)
WITH_DEXPREOPT := true
endif