This is a `perf report` from just 3-4s around reactivating a unity8 vt:
18,33% Mir/Input Reade libc-2.24.so [.] malloc 5,42% unity8 libQt5Core.so.5.7.1 [.] _ZL28qMetaTypeCustomType_unlockedPKciPi.constprop.817 4,55% MirServerThread libglib-2.0.so.0.5105.0 [.] g_main_context_dispatch 3,44% unity8 libQt5Qml.so.5.7.1 [.] _ZN3QV413InternalClass4findEPKNS_6StringE 2,34% unity8 libQt5Qml.so.5.7.1 [.] _ZNK3QV414QObjectWrapper12findPropertyEPNS_15ExecutionEngineEP15QQmlContextDataPNS_6StringENS0_12RevisionModeEP16QQmlPropertyData 2,31% unity8 libQt5Qml.so.5.7.1 [.] _ZN3QV413MemoryManager9allocDataEmm 1,83% unity8 libc-2.24.so [.] _int_free 1,56% unity8 libQt5Qml.so.5.7.1 [.] _ZN11QQmlBinding6updateE6QFlagsIN19QQmlPropertyPrivate9WriteFlagEE
This is a `perf report` from just 3-4s around reactivating a unity8 vt:
18,33% Mir/Input Reade libc-2.24.so [.] malloc ustomType_ unlockedPKciPi. constprop. 817 2.0.so. 0.5105. 0 [.] g_main_ context_ dispatch alClass4findEPK NS_6StringE ctWrapper12find PropertyEPNS_ 15ExecutionEngi neEP15QQmlConte xtDataPNS_ 6StringENS0_ 12RevisionModeE P16QQmlProperty Data Manager9allocDa taEmm g6updateE6QFlag sIN19QQmlProper tyPrivate9Write FlagEE
5,42% unity8 libQt5Core.so.5.7.1 [.] _ZL28qMetaTypeC
4,55% MirServerThread libglib-
3,44% unity8 libQt5Qml.so.5.7.1 [.] _ZN3QV413Intern
2,34% unity8 libQt5Qml.so.5.7.1 [.] _ZNK3QV414QObje
2,31% unity8 libQt5Qml.so.5.7.1 [.] _ZN3QV413Memory
1,83% unity8 libc-2.24.so [.] _int_free
1,56% unity8 libQt5Qml.so.5.7.1 [.] _ZN11QQmlBindin