The evolution of Garbage Collection Algorithms in Java
summary
Overview of how Java garbage collectors changed from mark sweep and generational designs to concurrent collectors and modern low-pause collectors. Shows concrete comparisons on HotSpot JVM: typical pause-time ranges, throughput tradeoffs, and memory footprint differences. Demonstrates GC log snippets and simple microbenchmarks that reproduce a surprising multi-second pause and how switching to G1 and ZGC reduces it to sub-100ms in the same workload.
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