Suchergebnisse mit Tag „speed“

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Passing arguments

Many functions, methods or subs (no matter how you call them) need some arguments. In Perl TIMTOWTDI, but some are faster than others. I'll compare eight ways to get arguments passed to a sub.

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Benchmarking mapping tables

Software often needs to transform values from A to B. Such transformations (given they're static) might be done using a database table, if/elsif blocks or a mapping table. Such tables are easy to create, maintain and understand. A database is always the slowest solution for a limited number of items, because the overhead for the client, network and database server is very big compared to sourcecode processing. Sourcecode-based solutions are faster, but which one is the best.

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Perlformance

TIMTOWDI: There is more than one way to do it ist das Perl-Credo. Some ways are better than others ergänzte Perl::Critic später und diesen Spruch möchte ich heute etwas abwandeln: Some ways are faster than others. Natürlich muss man sich die Frage stellen, wie wichtig Geschwindigkeit für eine Scriptsprache überhaupt ist. Sollten zeitkritische Aktionen nicht besser gleich in C oder einer ihrer Variationen geschrieben werden?

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Speed up RAID5/RAID6 write speed

I'm currently upgrading from Ubuntu 9.04 to Ubuntu 12.04, a long process as every upgrade does only one step. This is the price you pay for skipping all updates of the last years. It's even slower since I moved my root filesystem to a RAID6.

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Order your checks

Doing many checks may slow down a program, but sorting the tests may improve your program's speed a lot at a very low cost.
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Think looping

Software Developers need to think straight forward: Line 2 is executed after line 1, never before. But straight forward code isn't always good.
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