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In our efforts to decrease memory usage in Besu, we initially compared various system memory allocators: Malloc (default), TcMalloc (Google), Mimalloc (Microsoft), and Jemalloc. Based on the metrics we gathered, we found that Jemalloc outperformed the others for Besu's workload, reducing Besu's memory usage by over 40%. This significant reduction is primarily attributed to superior memory defragmentation and enhanced multithreading.
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