{"thread":{"id":"6050","subject":"Re: cloning the kernel - why long time in \"Resolving 313037 deltas\"","startedAt":"2006-12-21T08:41:42Z","lastAt":"2006-12-21T08:41:42Z","messageCount":1,"participants":["linux@horizon.com"],"isPatch":false,"patchVersion":null,"patchTotal":null},"messages":[{"id":"29913","messageId":"20061221084142.14347.qmail@science.horizon.com","threadId":"6050","inReplyTo":null,"subject":"Re: cloning the kernel - why long time in \"Resolving 313037 deltas\"","fromName":"","fromEmail":"linux@horizon.com","sentAt":"2006-12-21T08:41:42Z","receivedAt":"2006-12-21T08:41:42Z","isPatch":false,"sender":{"key":"linux@horizon.com","avatar":null},"body":"Remember, OS X is FreeBSD somehow layered on top of Mach 3.\nIn particular, it calls though to Mach for virtual memory.\n\nAnd Mach is at its heart an academic design aiming for flexibility in\nits VM system rather tha performance.  In particular, its provisions\nfor user-space pagers.\n\nI can easily believe that its mmap is 10x slower that Linux.  60x is.. a\nbit extreme.  A Darwin kernel hacker should probably get a nudge about it.\n"}]}