time complexity by just looking at code
2378
Big O, how do you calculate/approximate it?
132118
Computing the $n^{\textrm{th}}$ permutation of bits.
129299
Fibonacci sequence and Euclidean algorithm's connection.
87853
How to measure code performance in .NET?
107781
Detecting perfect squares faster than by extracting square root
152428
Tools for measuring empirical computational complexity of Java codes?
143573
Problem (1.8) A Path to Combinatorics Solution Verification.
21361
c++ practical computational complexity of  SQRT()
8645
A formula for bit strings with no $k$ consecutive $1$'s using generating functions
133617
Relatively prime property verification
121575
Meet-in-the-middle with checking complexity
41593
Use of Bijection for computation
57705
can the order of code make this program faster?
14849
Decidability of a predicate.
26569
Counting binary operations on a set with $n$ elements
42235
Programming with Dynamic
46430
A simple decision problem whose decidability is not known