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  1. Clément Béra, Eliot Miranda, Tim Felgentreff, Marcus Denker, and Stéphane Ducasse. Sista: Saving Optimized Code in Snapshots for Fast Start-Up. In Proceedings of the 14th International Conference on Managed Languages and Runtimes, ManLang 2017 p. 1—11, ACM, New York, NY, USA, 2017. DOI PDF 

    Modern virtual machines for object-oriented languages such as Java HotSpot, Javascript V8 or Python PyPy reach high performance through just-in-time compilation techniques, involving on-the-fly optimization and deoptimization of the executed code. These techniques require a warm-up time for the virtual machine to collect information about the code it executes to be able to generate highly optimized code. This warm-up time required before reaching peak performance can be considerable and problematic. In this paper, we propose an approach, Sista (Speculative Inlining SmallTalk Architecture) to persist optimized code in a platform-independent representation as part of a snapshot. After explaining the overall approach, we show on a large set of benchmarks that the Sista virtual machine can reach peak performance almost immediately after start-up when using a snapshot where optimized code was persisted. CCS Concepts. • Software and its engineering~Just-in-time compilers • Software and its engineering~Runtime environments