[arocks]

What makes you think I didn't? The author seems to agree with me. He even concludes that we should improve the implementation rather than the language for optimisation.

[tptacek]

I didn't get that from the presentation at all. What I read is a guy complaining that idiomatic Python is necessarily slow because it depends, for its clarity and terseness, on not controlling allocations or memory layout, and that Python- the- language abets the problem by having its standard library build on the same idiom.

[ynniv]

No, the author concludes that languages based on hash table lookups and lacking copy avoidance mechanisms are inherently slower.

[masklinn]

Which makes your comment useless and redundant. The very point of the presentation pretty much being "this declaration makes no sense"