preliminary notes on a nofl field-logging barrier
More from wingolog
Hey all, I had a fun bug this week and want to share it with you.numbers and representationsFirst, though, some background. Guile’s numeric operations are defined over the complex numbers, not
over e.g. a finite field of integers. This is generally great when
writing an algorithm, because you don’t have to think about how the
computer will actually represent the numbers you are working on.In practice, Guile will represent a small exact integer as a
Does the fediverse have a vibe? I think that yes, there’s a flave, and with reason: we have things in common. We all left Twitter, or refused to join in the first place. Many of us are technologists or tech-adjacent, but generally not startuppy. There is a pervasive do-it-yourself ethos. This last point often expresses itself as a reaction: if you don’t like it, then do it yourself, a different way. Make your...
Greetings, gentle readers. Today, an update on recent progress in the Whippet embeddable garbage collection library.feature-completenessWhen I started working on Whippet, two and a half years ago already, I was aiming to make a new garbage collector for Guile. In the beginning I was just focussing on proving that it would be advantageous to switch,...
Should your garbage collector be precise or conservative? The prevailing wisdom is that precise is always better. Conservative GC can retain more objects than strictly necessary, making GC slow: GC has to more frequently, and it has to trace a larger heap on each collection. However the calculus is not as straightforward as most people think, and indeed there are some reasons to expect that conservative root-finding can result in faster systems.(I have made / relayed some of...
Many years ago I read one of those Cliff Click “here’s what I learned” articles in which he was giving advice about garbage collector design, and one of the recommendations was that at a GC pause, running mutator threads should cooperate with the collector by identifying roots from their own stacks. You can read a similar assertion in their VEE2005 paper, The Pauseless...