Compress this sentence as much as possible without changing its meaning.
Although this method is not the fastest, it is certainly the most effective.
Though not quickest, it's most effective.
Complete the following task based on the instruction and optional input provided.### Instruction:
Compress this sentence as much as possible without changing its meaning.

### Input:
Although this method is not the fastest, it is certainly the most effective.

### Output:
Though not quickest, it's most effective.