This year, the YJIT team and I have gotten a paper accepted at MPLR 2023 (Managed Programming Languages and Runtimes), which is now freely available through ACM open access. The paper, titled “Evaluating YJIT’s Performance in a Production Context: A Pragmatic Approach”, goes into details of the strategy taken to evaluate YJIT’s performance in a production context. One of our key findings, when comparing YJIT against other existing Ruby JITs such as JRuby and TruffleRuby, is that YJIT is the most memory-efficient Ruby JIT (by a long shot).

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YJIT is a memory-efficient Ruby JIT compiler that outperforms the CRuby interpreter and competes with JRuby on most benchmarks. It has the lowest memory overhead compared to other Ruby JITs, making it suitable for production environments with limited memory. The performance of YJIT in production deployments is consistently faster than the interpreter even with frequent code deployments. The paper provides detailed analysis and evaluation of YJIT's performance, warm-up time, and memory usage.

YJIT Is the Most Memory-Efficient Ruby JIT