itorres

Catalonia, Spain

itorres.net

Age: 37

  • Rule 1. You can’t tell where a program is going to spend its time. Bottlenecks occur in surprising places, so don’t try to second guess and put in a speed hack until you’ve proven that’s where the bottleneck is.
  • Rule 2. Measure. Don’t tune for speed until you’ve measured, and even then don’t unless one part of the code overwhelms the rest.
  • Rule 3. Fancy algorithms are slow when n is small, and n is usually small. Fancy algorithms have big constants. Until you know that n is frequently going to be big, don’t get fancy. (Even if n does get big, use Rule 2 first.) For example, binary trees are always faster than splay trees for workaday problems.
  • Rule 4. Fancy algorithms are buggier than simple ones, and they’re much harder to implement. Use simple algorithms as well as simple data structures.
    The following data structures are a complete list for almost all practical programs: array, linked list, hash table, binary tree.
    Of course, you must also be prepared to collect these into compound data structures. For instance, a symbol table might be implemented as a hash table containing linked lists of arrays of characters.
  • Rule 5. Data dominates. If you’ve chosen the right data structures and organized things well, the algorithms will almost always be self-evident. Data structures, not algorithms, are central to programming. (See Brooks p. 102.)
  • Rule 6. There is no Rule 6.

-- Rob Pike, Programming in C: Complexity

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awarded Autobiographer
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awarded Informed
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comment Installing Grunt on OS X
@Armand, in this question npm has been installed through homebrew, hence sudo should be avoided. If a homebrew user needs to use sudo to alter /usr/local it means the install is botched.
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comment Installing Grunt on OS X
+1 @eirikir. Reference: Homebrew FAQ: Why does Homebrew say sudo is bad?
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awarded Revival
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awarded Teacher
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answered Access duckduckgo without https?
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awarded Enlightened
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awarded Nice Answer
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answered Any dangers associated with learning piano too young?
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awarded Autobiographer
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answered Won't read Unicode characters over NFS mount?
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awarded Critic
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comment Leading 0 missing from data and time
Good one. Very similar to the approach used in Mozilla's Date Javascript Reference: developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/…
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