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Systems & Performance

The most popular blog posts about systems & performance on Hacker News. 423 posts.

2016
394

The limitations of sampling profilers

Perf is probably the most widely used general purpose performance debugging tool on Linux. There are multiple contenders for the #2 spot, and, like perf, they're sampling profilers. Sampling profilers are great. They tend to be easy-to-use and low-overhead compared to most alternatives. However, there are large…

398

Notes on concurrency bugs

Do concurrency bugs matter? From the literature, we know that most reported bugs in distributed systems have really simple causes and can be caught by trivial tests, even when we only look at bugs that cause really bad failures, like loss of a cluster or data corruption. The filesystem literature echos this result …

401

Windows 10 Insider Preview Build 14316 Released

Hi everyone, Today we are releasing Windows 10 Insider Preview Build 14316 to Windows Insiders in the Fast ring. At Build 2016 last week, we shared new experiences and new opportunities we’re creating for developers with the Windows 10 Anniversary Update which we will be releasing for free to all Windows 10 customers…

410

Plan9 from?

I have been saying for years that I am seeing the same phenomonon today that I saw thirty years ago when the microprocessor was first invented. At that time I argued a lot with all the computer scientists. They insisted that microprocessors were not really computers because they did not run the same software that…

411

X86 Register Encoding

If you've ever look at the disassembly output for C or C++ code, you'll probably notice that there are a lot of push/pop instructions. And if you pay close enough attention, you'll notice that the compiler prefers to use certain registers over others. In particular, compilers will prefer pushing "old" registers like…

416

Building a Modern Bank Backend

At Monzo, we’re building a banking system from scratch. Our systems must be available 24x7 no matter what happens, scalable to hundreds of millions of customers around the world, and very extensible. This first post in a series about our platform explains how we’re building systems to meet these demands using modern…