Profiling - GoKawiil

Amazon's 'About You' profile page resurfaces attention months after May launch

Amazon's About You page, a personalization feature introduced in May, is drawing renewed attention online as users share screenshots of oddly specific inferences the system has made about them. Examples shared on Threads and Reddit include descriptions like having 'flat buttocks,' 'mismatched trash bins,' and 'owns a tiny funnel.' The page lets users view and edit the attributes Amazon has inferred to tailor shopping recommendations.

engadget.com · 2026-10-12

Investigation finds G1GC card-marking barrier makes Arrays.fill 265x slower than ParallelGC

A JMH benchmark filling two reference arrays showed drastically different results depending on garbage collector: about 0.5ms on ParallelGC versus 139ms on G1GC, despite no garbage collection occurring during the measured operations. The author traces this gap through JIT compilation and JVM flags down to a specific machine instruction responsible for the slowdown.

krzysztofslusarski.github.io · 2026-09-01