Skip to main content
Search type Search syntax
Tags [tag]
Exact "words here"
Author user:1234
user:me (yours)
Score score:3 (3+)
score:0 (none)
Answers answers:3 (3+)
answers:0 (none)
isaccepted:yes
hasaccepted:no
inquestion:1234
Views views:250
Code code:"if (foo != bar)"
Sections title:apples
body:"apples oranges"
URL url:"*.example.com"
Saves in:saves
Status closed:yes
duplicate:no
migrated:no
wiki:no
Types is:question
is:answer
Exclude -[tag]
-apples
For more details on advanced search visit our help page
Results tagged with
Search options not deleted user 3652

Performance is a subset of Optimization: performance is the goal when you want the execution time of your program or routine to be optimal.

2 votes

Sum of all primes under 2 million

For every prime number n>=5, n mod 6 returns 1 or n mod 6 returns 5. If you check these candidates for primeness by seeing if any prime number that is less than or equal to sqrt(n) divides a candidat …
vpit3833's user avatar
  • 119