This book constitutes the refereed post-conference proceedings of the Third International Symposium on Benchmarking, Measuring, and Optimization, Bench 2020, held virtually in November 2020.

The 12 revised full papers and 1 revised short paper presented were carefully reviewed and selected from 28 submissions.

Best Paper Session.- Characterizing the Sharing Behavior of Applications using Software Transactional Memory.- swRodinia: A Benchmark Suite for Exploiting Architecture Properties of Sunway Processor.- Data Management and Storage.- Impact of Commodity Networks on Storage Disaggregation with NVMe-oF.- K2RDF: A Distributed RDF Data Management System on Kudu and Impala.- Artemis: An Automatic Test Suite Generator for Large Scale OLAP Database.- OStoreBench: Benchmarking Distributed Object Storage Systems Using Real-world Application Scenarios.- ConfAdvisor: An Automatic Configuration Tuning Framework for NoSQL Database Services with a Black-box Approach.- Supercomputing.- Optimization of the Himeno Benchmark for SX-Aurora TSUBASA.- Benchmarking on GPU.- Parallel sorted sparse approximate inverse preconditioning algorithm on GPU.- ComScribe: Identifying Intra-node GPU communication.- Application and Dataset.- A Benchmark of Ocular Disease Intelligent Recognition: One Shot for Multi-disease Detection.- MAS3K: An Open Dataset for Marine Animal Segmentation.- Benchmarking Blockchain Interactions in Mobile Edge Cloud Software Systems.

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