 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
l |
Performance
problems occur in a small portion of code
|
|
|
|
l |
4% of
application code accounts for more than 50% of the
|
|
|
execution
time. - Donald Knuth
|
|
|
l |
20%
of application code accounts for 80% of the execution time
|
|
- Barry Boehm
|
|
l |
Developers,
using guesswork, are notoriously bad at
|
|
|
deciding
what code to optimize
|
|
|
l |
Measuring
performance statistics helps developers find
|
|
|
that
4% of code to optimize
|
|