.Net

Beware of implicit boxing of value types

In the last post, we looked at some inefficiencies with reference types in .Net and perhaps oversold value types a little  In any case, now that we’ve made the initial sale and you’re back for more, let’s talk about some pitfalls wrt the use of value types you should be aware of. Specifically let’s focus on cases …

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Smallest .Net ref type is 12 bytes (or why you should consider using value types)

(Update 2015/07/21 : read the next post in this series to learn about the places where implicit boxing happens with value types and how you can prevent them)   I chanced upon Sasha Goldshtein’s excellent book, Pro .Net Performance : Optimize Your C# Application, a few years back and I thoroughly enjoyed it. Even though …

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Design for Latency issues

The most common issue I have encountered in production are latency/performance related. They can be symptoms of a whole host of underlying causes ranging from AWS network issues (which can also manifest itself in latency/error-rate spikes in any of the AWS services), over-loaded servers to simple GC pauses. Latency issues are inevitable – as much …

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Project Euler – Problem 68 Solution

Problem Consider the following “magic” 3-gon ring, filled with the numbers 1 to 6, and each line adding to nine. Working clockwise, and starting from the group of three with the numerically lowest external node (4,3,2 in this example), each solution can be described uniquely. For example, the above solution can be described by the …

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Project Euler – Problem 64 Solution

Problem All square roots are periodic when written as continued fractions and can be written in the form: For example, let us consider ?23: If we continue we would get the following expansion: The process can be summarised as follows: It can be seen that the sequence is repeating. For conciseness, we use the notation …

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Project Euler – Problem 80 Solution

Problem It is well known that if the square root of a natural number is not an integer, then it is irrational. The decimal expansion of such square roots is infinite without any repeating pattern at all. The square root of two is 1.41421356237309504880…, and the digital sum of the first one hundred decimal digits …

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Project Euler – Problem 61 Solution

Problem Triangle, square, pentagonal, hexagonal, heptagonal, and octagonal numbers are all figurate (polygonal) numbers and are generated by the following formulae: The ordered set of three 4-digit numbers: 8128, 2882, 8281, has three interesting properties. The set is cyclic, in that the last two digits of each number is the first two digits of the …

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Metricano – simplifying application monitoring

On application monitoring In the Gamesys social team, our view on application monitoring is such that anything that runs in production needs to be monitored extensively all the time – every service entry point, IO operations or CPU intensive tasks. Sure, it comes at the cost of a few CPU cycles which might mean that …

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