From 7d8196ea2f4ec3634dbad7367345e62c4ea9893d Mon Sep 17 00:00:00 2001 From: Eike Rathke Date: Thu, 22 Sep 2016 22:20:48 +0200 Subject: perf: eliminate SfxSimpleHint and move to SfxHint, tdf#87101 related There were over 150 places in *::Notify() functions that did some dynamic_cast of which ~98% were unnecessary because the base class SfxHint passed was an SfxSimpleHint anyway. dynamic_cast operations come with quite some cost, so avoid if possible. Specifically for ScFormulaCell::Notify() that created a bottleneck in scenarios where cells were notified that already handled a previous notification. In mass operations doing the dynamic_cast before it could be decided whether having to act on it or not this made 2/3 of all time spent in the Notify() call. To get rid of that rename/move SfxSimpleHint to SfxHint and let classes derive from SfxHint instead of SfxSimpleHint. This comes only with a slight cost that an additional sal_uInt32 is transported in such hints, initialized to 0, but this is neglectable compared to the huge gain. For the rare cases where a Notify() actually expects both, an SfxHint (formerly SfxSimpleHint) and a derived hint, this changed order of the dynamic_cast involved so the simple SfxHint::GetId() is handled last. Modules using such combinations can further optimize by treating the simple SfxHint::GetId() first once verified that none of the other derived hints use an ID not equal to zero respectively none of the ID values the simple hint uses. Change-Id: I9fcf723e3a4487ceb92336189d23a62c344cf0ce Reviewed-on: https://gerrit.libreoffice.org/29205 Reviewed-by: Eike Rathke Tested-by: Eike Rathke --- sc/inc/refhint.hxx | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'sc/inc/refhint.hxx') diff --git a/sc/inc/refhint.hxx b/sc/inc/refhint.hxx index 209d35c2001d..a1627748cb23 100644 --- a/sc/inc/refhint.hxx +++ b/sc/inc/refhint.hxx @@ -18,7 +18,7 @@ namespace sc { struct RefUpdateContext; class ColRowReorderMapType; -class RefHint : public SfxSimpleHint +class RefHint : public SfxHint { public: enum Type { -- cgit v1.2.3