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Questions tagged micro-optimization

15 questions

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44
votes
4
answers

Does calculating Sqrt(x) as x * InvSqrt(x) make any sense in the Doom 3 BFG code?

c++ optimization micro-optimization math.h
asked 2012-11-28T12:25:03.930
37
votes
4
answers

Cycles/cost for L1 Cache hit vs. Register on x86?

performance x86 cpu-architecture cpu-cache micro-optimization
asked 2012-04-23T03:08:11.003
32
votes
5
answers

Modern x86 cost model

performance assembly x86 floating-point micro-optimization
asked 2012-03-31T15:01:55.043
11
votes
2
answers

LINQ Count() until, is this more efficient?

c# performance linq ienumerable micro-optimization
asked 2012-03-09T01:21:01.640
10
votes
6
answers

AND faster than integer modulo operation?

assembly arm cpu-architecture micro-optimization
asked 2011-10-06T16:11:00.160
86
votes
8
answers

Fastest way to strip all non-printable characters from a Java String

java string performance optimization micro-optimization
asked 2011-08-23T13:10:54.123
9
votes
5
answers

Branch on ?: operator?

c++ hardware micro-optimization branchless
asked 2011-08-19T21:45:05.250
76
votes
6
answers

Is reading the `length` property of an array really that expensive an operation in JavaScript?

javascript arrays micro-optimization
asked 2011-04-22T06:36:04.193
9
votes
9
answers

Why cant register variables be made global?

c global cpu-registers micro-optimization
asked 2010-08-15T08:30:30.803
53
votes
16
answers

' ... != null' or 'null != ....' best performance?

java performance micro-optimization
asked 2010-03-08T00:14:11.900
71
votes
12
answers

What is the fastest way to find if a number is even or odd?

c micro-optimization
asked 2010-02-09T12:55:24.147
16
votes
8
answers

Verifying compiler optimizations in gcc/g++ by analyzing assembly listings

c++ c assembly gcc micro-optimization
asked 2010-01-06T22:26:52.210
11
votes
13
answers

Does rearranging a conditional evaluation speed up a loop?

c++ optimization micro-optimization premature-optimization
asked 2009-04-09T13:13:58.837
10
votes
3
answers

What's the most efficient way to make bitwise operations in a C array

c performance micro-optimization
asked 2009-03-20T22:52:04.047
16
votes
4
answers

Speed of CSS

css performance rendering micro-optimization
asked 2009-02-11T09:32:25.867