qat.nnize.metric.DurationMetric
- class qat.nnize.metrics.DurationMetric
This metric must be used to reduce the overall time of execution. To use this metric, the duration of each gate must be known, use
set_gate_timeto define the time of each gate.This metric may be also used to minimize the overall idle time. To minimize the overall idle time, use
minimize_idle_time()Warning
Please note that the output of this function can be altered if this metric is used with a Nnizer having the “ignore_large_gate” option enabled. When this option is enabled, this metric will not see large gates
- get_best_index()
Returns the index of the candidate which minimize the quantum cost
- Parameters
base_path (GateList) – base path
candidates (cpplist[GateList]) – list of candidates
- Returns
index of the best candidate
- Return type
int
- init()
Execute this function to warn this metric that the given nnizer is ready and entirely defined.
- minimize_idle_time()
Change the metric to minimize the overall idle time. To reset the metric (to minimize the overall time of execution instead of the overall idle time), use
minimize_overall_time()
- minimize_overall_time()
Change the metric to minimize the overall time of the quantum circuit.
- set_gate_time()
Define the dictionnary describing the time of execution of each gate
- Parameters
gate_time (dict<str, float or function>) – dictionnary describing the time of execution of each gate. A key correspond to the name of the gate (add
C-at the beginning of the gate to control the gate,D-to dag the gate,T-to transpose the the gate ofS-to conjugate the gate) and the value correspond to the time of execution. Use “-DEFAULT-” as gate name to define the default duration of a gate