"So on one hand we don’t want to write everything in C “for speed” but on the other hand we need to avoid showstoppers such as Python, a bottleneck data structu

"So on one hand we don’t want to write everything in C “for speed” but on the other hand we need to avoid showstoppers such as Python, a bottleneck data structure stored on disk, a quadratic algorithm, etc." That part about Python deserves more explaining. Surely that's a jest, right?