# Disable Loop Unrolling

Unrolling a loop increases the size of the loop proportionally to the unroll factor.

Disabling (or limiting) this optimization may help reduce code size at the expense of performance.

Options to specify:

Linux* and macOS*: | -unroll=0
Windows*: | /Qunroll:0

Advantages of this method: | Code size is reduced.
Disadvantages of this method: | Performance of otherwise unrolled loops may noticeably degrade because this limits other possible loop optimizations.

### Note

This option is already the default if you specify option Os or option O1.
Parent topic: Methods to Optimize Code Size