mwop, 18 days ago

@sean The performance is always limited by the number of I/O operations. It’s almost never the runtime. I’ll die on that hill.

afilina, 18 days ago

@mwop @sean Indeed. Whenever someone comes to me saying that something is extremely slow, I usually start by logging the query count.

I did occasionally had horrendous CPU-related issues. For example, I saw unnecessarily deeply-nested loops over huge data sets. Those are rare, and also not the language's fault. Slight refactoring led to a 10,000x improvement.