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pv_focus snapshot for existing function

Code
  pv_focus(p, "inner")
Output
  ## FOCUS: inner
  
  
  ### Time Analysis
    Total time:       30 ms ( 60.0%)  - time on call stack
    Self time:        10 ms ( 20.0%)  - time at top of stack
    Child time:       20 ms ( 40.0%)  - time in callees
    Appearances:       3 samples
  
  ### Called By
        3 calls (100.0%)  outer
  
  ### Calls To
        2 calls ( 66.7%)  deep
  
  ### Source Locations
  Hot lines (by self-time):
       10 ms (20.0%)  R/main.R:15
                     z <- heavy_computation()
  
  ### Source Context: R/main.R
         10:   result
         11: }
         12: 
         13: 
         14: 
  >      15:   z <- heavy_computation()
  
  ### Next steps
  pv_focus(p, "deep")
  pv_callers(p, "inner")
  pv_focus(p, "outer")
  pv_source_context(p, "R/main.R")

pv_focus handles non-existent function

Code
  pv_focus(p, "nonexistent")
Output
  Function 'nonexistent' not found in profiling data.
  
  Available functions (top 20 by time):
    outer
    inner
    deep
    helper
  
  Run pv_help() to see all available functions.

pv_focus handles no source refs

Code
  pv_focus(p, "foo")
Output
  ## FOCUS: foo
  
  
  ### Time Analysis
    Total time:       30 ms (100.0%)  - time on call stack
    Self time:        10 ms ( 33.3%)  - time at top of stack
    Child time:       20 ms ( 66.7%)  - time in callees
    Appearances:       3 samples
  
  ### Called By
        3 calls (100.0%)  (top-level)
  
  ### Calls To
        1 calls ( 33.3%)  bar
        1 calls ( 33.3%)  baz
  
  ### Source Locations
    Source references not available.
    Use devtools::load_all() to enable.
  
  ### Next steps
  pv_focus(p, "bar")
  pv_callers(p, "foo")

pv_focus handles more than 5 callers

Code
  pv_focus(p, "target")
Output
  ## FOCUS: target
  
  
  ### Time Analysis
    Total time:       60 ms (100.0%)  - time on call stack
    Self time:        60 ms (100.0%)  - time at top of stack
    Child time:        0 ms (  0.0%)  - time in callees
    Appearances:       6 samples
  
  ### Called By
        1 calls ( 16.7%)  caller1
        1 calls ( 16.7%)  caller2
        1 calls ( 16.7%)  caller3
        1 calls ( 16.7%)  caller4
        1 calls ( 16.7%)  caller5
    ... and 1 more callers
  
  ### Calls To
    Callees: none
  
  ### Source Locations
    Source references not available.
    Use devtools::load_all() to enable.
  
  ### Next steps
  pv_callers(p, "target")
  pv_focus(p, "caller1")

pv_focus shows callees none for leaf function

Code
  pv_focus(p, "bar")
Output
  ## FOCUS: bar
  
  
  ### Time Analysis
    Total time:       10 ms ( 33.3%)  - time on call stack
    Self time:        10 ms ( 33.3%)  - time at top of stack
    Child time:        0 ms (  0.0%)  - time in callees
    Appearances:       1 samples
  
  ### Called By
        1 calls (100.0%)  foo
  
  ### Calls To
    Callees: none
  
  ### Source Locations
    Source references not available.
    Use devtools::load_all() to enable.
  
  ### Next steps
  pv_callers(p, "bar")
  pv_focus(p, "foo")

pv_focus handles more than 5 callees

Code
  pv_focus(p, "target")
Output
  ## FOCUS: target
  
  
  ### Time Analysis
    Total time:       60 ms (100.0%)  - time on call stack
    Self time:         0 ms (  0.0%)  - time at top of stack
    Child time:       60 ms (100.0%)  - time in callees
    Appearances:       6 samples
  
  ### Called By
        6 calls (100.0%)  (top-level)
  
  ### Calls To
        1 calls ( 16.7%)  callee1
        1 calls ( 16.7%)  callee2
        1 calls ( 16.7%)  callee3
        1 calls ( 16.7%)  callee4
        1 calls ( 16.7%)  callee5
    ... and 1 more callees
  
  ### Source Locations
    Source references not available.
    Use devtools::load_all() to enable.
  
  ### Next steps
  pv_focus(p, "callee1")
  pv_callers(p, "target")

pv_focus handles function with source refs but no self-time with source

Code
  pv_focus(p, "target")
Output
  ## FOCUS: target
  
  
  ### Time Analysis
    Total time:       10 ms (100.0%)  - time on call stack
    Self time:         0 ms (  0.0%)  - time at top of stack
    Child time:       10 ms (100.0%)  - time in callees
    Appearances:       1 samples
  
  ### Called By
        1 calls (100.0%)  (top-level)
  
  ### Calls To
        1 calls (100.0%)  deep
  
  ### Source Locations
    No self-time with source info.
  
  ### Next steps
  pv_focus(p, "deep")
  pv_callers(p, "target")