QAccessibleWidget: replace QString default arg with overloadHEADdev

We should not use defaulted arguments of non-trivial type, because
their construction and destruction, even if not passed, is repeated at
every call site, producing O(n) executable code.

By overloading out-of-line, we execute the same code at runtime, but
we have only one copy of the arg construction and destruction, in the
library, O(1) executable code production.

Found in API-review of QAccessibleWidgetV2.

Amends the start of the public history.

Can't pick further than (unreleased) 6.10, because this adds a new
symbol.

Pick-to: 6.10
Task-number: QTBUG-98117
Change-Id: I705bca764992d9e7a2aa1021e0f94006b6817177
Reviewed-by: Volker Hilsheimer <[email protected]>

0 files changed, 0 insertions, 0 deletions