The optimizer is at an early stage and is disabled by default. Backwards compatability cannot be guaranteed at this point.
The optimizer is a tool for improving performance and reducing resource consumption. In this context, the terms performance and resource can apply across multiple dimensions, including but not limited to: compiled code size, scratch slot usage, opcode cost, etc.
The compiler determines which optimizations to apply based on the provided :any:`OptimizeOptions` object as shown in the code block below. The :any:`OptimizeOptions` constructor receives a set of keyword arguments representing flags corresponding to particular optimizations. If arguments are not provided to the constructor or no :any:`OptimizeOptions` object is passed to :any:`compileTeal` then the default behavior is that no optimizations are applied.
| Optimization Flag | Description | Default |
|---|---|---|
scratch_slots |
A boolean describing whether or not scratch slot optimization should be applied. | False |
optimize_options = OptimizeOptions(scratch_slots=True)
compileTeal(approval_program(), mode=Mode.Application, version=4, optimize=optimize_options)