search for: addreferencetosymbol

...amegraph results (now zoomable): https://people.freebsd.org/~davide/llvm/lld.svg Nick, to answer your question DenseMap ops are a generally an hotspot for this kind of workload, although grow() operations aren't particularly a big problem (at least in this case). I see them showing up only for addReferencetoSymbol() and they account for large part of the overall samples. In order to convince myself of my theory I started tinkering and modified the initial size of the map but I wasn't able to notice any non-negligible improvement. What instead seems to be a bigger problem is symbolTable::replacement, Den...

I spent a week to optimize LLD performance and just wanted to share things what I found. Also if there's anyone who have a good idea on how to make it faster, I'd like to hear. My focus is mainly on Windows, but my optimizations are generally platform neutral. I aim both single-thread and multi-thread performance. r231434 <http://reviews.llvm.org/rL231454> is a change that has the