SWI-Prolog -- profile

Documentation
- Reference manual
  - Built-in Predicates
    - Execution profiling
      - library(prolog_profile): Execution profiler
        
        profile/1
        
        profile/2
        
        show_profile/1
        
        profile_data/1
        
        profile_procedure_data/2
- Packages

Availability::- use_module(library(prolog_profile)).(can be autoloaded)

[det]profile_data(-Data)

Gather all relevant data from profiler. This predicate may be called while profiling is active in which case it is suspended while collecting the data. Data is a dict providing the following fields:

summary:Dict

Overall statistics providing

samples:Count: Times the statistical profiler was called
ticks:Count Virtual ticks during profiling
accounting:Count Tick spent on accounting
time:Seconds Total time sampled
nodes:Count Nodes in the call graph.
sample_period: MicroSeconds Same interval timer period in micro seconds
ports: Ports One of true, false or classic

nodes

List of nodes. Each node provides:

predicate:PredicateIndicator
ticks_self:Count
ticks_siblings:Count
call:Count
redo:Count
exit:Count
callers:list_of(Relative)
callees:list_of(Relative)

Relative is a term of the shape below that represents a caller or callee. Future versions are likely to use a dict instead.

node(PredicateIndicator, CycleID, Ticks, TicksSiblings,
     Calls, Redos, Exits)