miniblog.

Let’s take a look what is inside Java 12. The new Java release contains less major enhancements than the previous version: 8 JEPs in Java 12 vs 17 JEPs in Java 11. As you of course remember, JEP stands for JDK Enhancement Proposal. Java 11 also had more closed entries in Jira: ~2700 in Java 11 vs ~2400 in Java 12. But it’s only mid of Feb 2019, maybe they can deliver 300 Jira entries by Mar 19th 2019 when Java 12 is planned to be released. Now let’s take a closed look what is in Java 12.

After two years of nightly testing, we’ve come to learn the power and limitations of Jepsen as a testing tool.

There are ways to get fixes into the stable kernel trees, but they require humans to identify [...]

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Programs written in C/C++ can suffer from serious memory fragmentation, leading to low utilization of memory, degraded performance, and application failure due to memory exhaustion. This paper introduces Mesh, a plug-in replacement for malloc that, for the first time, eliminates fragmentation in unmodified C/C++ applications. Mesh combines novel randomized algorithms with widely-supported virtual memory operations to provably reduce fragmentation, breaking the classical Robson bounds with high probability. Mesh generally matches the runtime performance of state-of-the-art memory allocators while reducing memory consumption; in particular, it reduces the memory of consumption of Firefox by 16% and Redis by 39%.

While I was writing the post comparing the new Qualcomm server chip, Centriq, to our current stock of Intel Skylake-based Xeons, I noticed a disturbing phenomena.