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 …

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

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 …

Met­ri­cano – sim­pli­fy­ing appli­ca­tion mon­i­tor­ingRead More »

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