A Crash Course in Modern Hardware by Cliff Click

What people said

NovaX · 2025-03 · Recommendation

This was a good attempt but flawed. 1. You should use JMH to handle warmup, jit, timings, averaging of runs, etc. You might enjoy the following talks on the subject, though I am sure there are other gems out there. - Performance Anxiety: [LINK] - Benchmarking for Good: [LINK] - (The Art of) (Java) Benchmarking: [LINK] - A Crash Course in Modern Hardware: [VIDEO] - How NOT to Write a Microbenchmark [LINK] - Anatomy of a flawed microbenchmark [LINK] 2. An uncontended lock is basically free, as you noticed. 3. Guava does implement the Map interface via asMap(). It also have a concurrencyLevel to adjust its performance. It is based on Java 5's CHM. 4. Caffeine is a Guava Cache rewrite based on Java 8's CHM rewrite, plus many learnings. You might look at its benchmarks for ideas: [LINK] 5. Data structures are surprisingly tricky. For example see this analysis showing an accidental misunderstanding degrading an LRU to O(n) eviction. [LINK] 6. It is important to remember that the goal of a benchmark is never which is faster or by how much. It is to ask (a) is it fast enough? (b) might I reach a point where it will not be? and (c) does it degrade unexpectedly? == This is to say the winner is of little interest, once all the choices are good enough then it is about usability, features, documentation, friendliness, and so on.

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tjalfi · 2021-06 · Recommendation

I'm also a fan of Cliff and other Rice alumni; here are a few of his videos that I like. [0] The Sea of Nodes and the HotSpot JIT [1] A JVM Does That? [2] A Crash Course in Modern Hardware [3] Bits of Advice for the VM Writer [0] [LINK] [1] [LINK] [2] [VIDEO] [3] [LINK]

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zellyn · 2017-03 · Recommendation

Coincidentally, I just watched this last night: it's a really accessible refresher if you're a bit outdated on how all these caches work and interact: [VIDEO]

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