Linked by Hadrien Grasland on Fri 28th Jan 2011 20:37 UTC
OSNews, Generic OSes It's recently been a year since I started working on my pet OS project, and I often end up looking backwards at what I have done, wondering what made things difficult in the beginning. One of my conclusions is that while there's a lot of documentation on OS development from a technical point of view, more should be written about the project management aspect of it. Namely, how to go from a blurry "I want to code an OS" vision to either a precise vision of what you want to achieve, or the decision to stop following this path before you hit a wall. This article series aims at putting those interested in hobby OS development on the right track, while keeping this aspect of things in mind.
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RE[9]: Machine language or C
by Alfman on Sun 30th Jan 2011 09:13 UTC in reply to "RE[8]: Machine language or C"
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"On the other hand, premature optimization is always a waste. I just can't think of a way to extract a benefit from it."

I am just being a contrarian here for the sake of it, but all too often a business will ship code without any consideration of the efficiency of the contained algorithms. The users inevitably come back complaining about performance, and the ultimate solution ends up with buying new hardware since nobody wants to touch the code.

Arguably, a good programmer, who keeps an eye open for places to optimize, should do so immediately if there is no loss in readability. Programmers who get used to this practice will train themselves to write more efficient code from the start without spending too much time thinking about it.

On the other hand, I found myself in an argument with a CTO at an ex-employer about removing all string concatenation in dotnet web services in favor of string builders. He was totally adamant about this that it became a company wide policy to do all concatenation with a string builder. Presumably he read something about string builder being better somewhere, and he over generalized the point to the extreme.

I submitted a test suite to measure his claims and low and behold, for the vast majority of concatenations he was having us remove, the result actually made things (marginally) worse. So there he is convincing clients we're optimizing the product... He didn't want to loose credibility so his policy stuck, but we didn't get along after that. What a mess.

I hope someone kicks me off my high horse if I ever become so blind.

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