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Details

Type: Bug
Resolution: Done
Priority: P2: Important
Fix Version/s: 6.4.0 Beta1
Affects Version/s: 6.3.0
Component/s: Quick: Core Declarative QML
Labels:
None

Platform/s:

Android
Commits:
78c62a9f03 (qt/qtdeclarative/dev) 78c62a9f03 (qt/tqtc-qtdeclarative/dev)

Description

JIT is disabled on Android. Is this on purpose? Or is this an oversight? Can and should we enable JIT on Android?

JIT is currently disabled. When configuring qtdeclarative, the output is

Qt QML:
  QML network support .................... yes
  QML debugging and profiling support .... yes
  QML just-in-time compiler .............. no
  QML XML http request ................... yes
  QML Locale ............................. yes

This is due to the code in

https://code.qt.io/cgit/qt/qtdeclarative.git/tree/src/qml/configure.cmake?id=39635d025444e61acc0417b088411199b6bea334#n117

JIT is only enabled on "LINUX OR IOS OR TVOS OR QNX OR INTEGRITY".

This CMake code is a port of the code which is removed in
https://codereview.qt-project.org/c/qt/qtdeclarative/+/259277/5/src/qml/jsruntime/qv4global_p.h

Also there, no Android:

#elif defined(Q_PROCESSOR_ARM_64) && (QT_POINTER_SIZE == 8)
#  if defined(Q_OS_LINUX) || defined(Q_OS_QNX) || defined(Q_OS_INTEGRITY)
#    define V4_ENABLE_JIT