System information

• solvespace from master @ 7795b0b
• Debian testing, amd64
• gcc 10.2.1

Details

I was doing a small project for fun, and went a bit over board with some holes in a sheet metal, to the point where it takes about 4 minutes to render do anything useful.

I used an extrusion of translate of translate to generate a 2D pattern.

case-vents.slvs.gz (~20MB unpacked, can take few minutes to open, be warned).

Looking at perf top, and a bit of code in Generate, it looks like the major culprit it CopyEntity, which triggers a copy of Entity classes. The base class (EntityBase) has two std::string fields str and font, which I believe should not be in the EntityBase, as most of the entities doesn't use these fields actually. Because they are there directly, each construction and destruction, will be called every time any entity is copied (I don't know if it will also trigger malloc/free, which could be even worse). In perf I see ~basic_string<...>, using about 90% of the CPU. Platform::Path file from EntityBase, also shows quite a lot in perf top. Other option is to use reference counting for strings maybe. Not sure.