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RubyKaigi2017 http://rubykaigi.org/2017/presentations/nirvdrum.html We’ve solved the startup time problem in TruffleRuby! In this talk, I’ll introduce the SubstrateVM and how we make use of it to compile the Java-based TruffleRuby to a static binary and massively improve our startup time.
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The video titled "Improving TruffleRuby’s Startup Time with the SubstrateVM" features Kevin Menard from Oracle, presenting at RubyKaigi 2017. The focus of the talk is on the advancements made in TruffleRuby, particularly in terms of reducing startup time through the use of the Substrate Virtual Machine (SubstrateVM). Key Points Discussed: - **Introduction to TruffleRuby**: - A Ruby implementation leveraging the Truffle framework for improved performance. - Originated from the JRuby project and aims for high compatibility with Ruby's core libraries and gems. - **Performance Metrics**: - Current performance statistics show that while MRI Ruby executes tests quickly, TruffleRuby has slower startup times (1.7 seconds) compared to MRI (40 milliseconds). - Discussions on the benchmark metrics for performance comparing MRI, JRuby, and TruffleRuby. - **Concept of SubstrateVM**: - Aimed at producing static binaries to enhance startup performance dramatically, achieving a reduction from 1.7 seconds down to about 100 milliseconds for simple applications. - Describes the process involved in utilizing SubstrateVM, including ahead-of-time compilation and static analysis, which ensure only necessary components are included in the binary. - **Challenges and Limitations**: - While startup times can greatly improve, there are challenges regarding dynamic class loading and memory usage that still need to be addressed. - The importance of handling native calls appropriately, given they can incur overhead if managed through the JVM. - **Future Enhancements**: - Consecutive improvements to reduce the overhead when managing memory and further optimizing native calls are highlighted. - Mentioned the potential for even shorter execution times for language specifications, dropping down from 47 seconds to under 20 seconds. Conclusions: - The work on TruffleRuby and the SubstrateVM demonstrates significant promise towards creating a Ruby implementation that not only matches but surpasses traditional runtime efficiency with reduced startup times. - Future community collaboration is encouraged to drive further enhancements in the capabilities of TruffleRuby and its integration with various native extensions, aiming for an overall more efficient Ruby runtime experience.
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