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A comment on The Cost of Exception Handling. Parent comment

Re:The Cost of Exception Handling by hayley-patton on Saturday November 12, 2022 @05:26PM (#33577792)
Pauseless [0]? It originally used hardware support on Azul machines to trap upon reading an unmarked pointer, but now (in the C4 generational incarnation, as well as in ZGC) this is done in software. But the other collectors use snapshot-at-the-beginning and a write barrier for concurrent marking, which originated in 1990 [1].

[0] https://www.usenix.net/legacy/events/vee05/full_papers/p46-c...

[1] https://core.ac.uk/download/pdf/39218501.pdf

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Re:The Cost of Exception Handling by hayley-patton on Sunday November 13, 2022 @12:01AM (#33580236)
And, if one wants to be picky, Pauseless is a variation of Henry Baker's "real-time" copying collector from 1978 [2], although Pauseless uses tags corresponding to various interesting states (marked/unmarked, forwarded/unforwarded) rather than just from-space/to-space.

[2] https://plover.com/~mjd/misc/hbaker-archive/RealTimeGC.html

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