Quartus II Settings File Reference Manual - Altera

Chapter 6: Fitter Assignments 6–129
FITTER_EFFORT
FITTER_EFFORT
Type
Controls the trade-off between performance and compilation speed of the Fitter. The
Auto Fit setting adjusts the Fitter optimization effort to minimize compilation time
while still achieving the design timing requirements. The
FITTER_AUTO_EFFORT_DESIRED_SLACK_MARGIN option can be used to
request that Auto Fit apply sufficient optimization effort to achieve additional timing
margin. The Standard Fit setting uses maximum effort regardless of the requirements
of the design, leading to higher compilation time and more margin on easier designs.
For difficult designs, the Auto Fit and Standard Fit settings both use maximum effort.
The Fast Fit setting decreases optimization effort to reduce compilation time, which
may degrade design performance.
Enumeration
■ Auto Fit
■ Fast Fit
■ Standard Fit
Device Support
This setting can be used in projects targeting any Altera device family.
Notes
This assignment is included in the Fitter report.
Syntax
set_global_assignment -name FITTER_EFFORT
Default Value
Auto Fit
June 2012 Altera Corporation Quartus Settings File
Reference Manual