Swift Forums

Swift sucks at web serving… or does it?

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Chart showing throughput (requests per second) over number of concurrent requests, for four different web servers (representing the programming languages JavaScript, PHP, Kotlin - erroneously labelled as Java on the chart - and Swift).

A few weeks ago, Axel Roest published a simple web server comparison, that turned out to not be doing what it was thought to be doing. Figuring that out was a very interesting discussion that warrants a retrospective, to look at which parts were particularly helpful and which not so much. Tangentially, I want to… Read more

-fomit-frame-pointer

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Explanatory diagram of frame pointers, showing a link from the x86-64 register %rbp to the start of the current frame, which holds the prior value of %rbp that points to the top of the previous frame, and so on.

This is an elaboration of a post I made in a Swift Forums thread, SE-0419: Swift Backtracing API. The question was raised whether an official Swift backtracer should try to support code that doesn’t use frame pointers. Which immediately raised the question – in my mind – of if anyone is still using the “optimisation”… Read more