[Lldb-commits] [lldb] [lldb/DWARF] Search fallback to the manual index in GetFullyQualified… (PR #102123)

[Pavel Labath via lldb-commits]

labath wrote:

Sort of yes (*), but only so much as it is necessary to make it correct, and the level of slowdown depends on how much non-indexed code you have. The fallback index will only index those units that aren't covered by the debug_names index, so if debug_names covers everything, the fallback is a noop -- if there's one non-indexed unit, you only pay the cost of indexing that unit.

(*) except not really. The most expensive fallback operation is building the manual index (afterwards, it may even be faster than debug_names), and this happens first time that anything queries it. Since all of the other debug_names methods are already calling the fallback index, it will most likely be already built by the time we get to this point and the fallback call should be fast.

https://github.com/llvm/llvm-project/pull/102123