diagnostics.md

pv_print_gc_pressure snapshot with high GC

Code
  pv_print_gc_pressure(p)
Output
  ## GC PRESSURE
  
  
  severity: high
  pct: 40.0
  time_ms: 40
  issue: High GC overhead (40.0%)
  cause: Excessive memory allocation
  actions: growing vectors, repeated data frame ops, unnecessary copies
  
  ### Next steps
  pv_print_memory(p, by = "function")
  pv_print_memory(p, by = "line")
  pv_suggestions(p)

pv_print_gc_pressure snapshot with no GC

Code
  pv_print_gc_pressure(p)
Output
  ## GC PRESSURE
  
  
  No significant GC pressure detected (<10% of time).
  Run pv_help() to see all available functions.

pv_print_suggestions snapshot with GC pressure

Code
  pv_print_suggestions(p)
Output
  ## OPTIMIZATION SUGGESTIONS
  
  
  ### Priority 1
  
  category: hot line
  location: R/work.R:5
  action: Optimize hot line (60.0%)
  pattern: work
  potential_impact: 60 ms (60.0%)
  
  ### Priority 2
  
  category: memory
  location: memory allocation hotspots
  action: Reduce memory allocation
  pattern: c(x, new), rbind(), growing vectors
  replacement: pre-allocate to final size
  potential_impact: Up to 20 ms (20%)
  
  category: hot function
  location: work
  action: Profile in isolation (60.0% self-time)
  pattern: work
  potential_impact: 60 ms (60.0%)
  
  
  ### Next steps
  pv_hot_lines(p)
  pv_gc_pressure(p)

pv_print_suggestions handles profile with no suggestions

Code
  pv_print_suggestions(p)
Output
  ## OPTIMIZATION SUGGESTIONS
  
  
  ### Priority 2
  
  category: hot function
  location: x
  action: Profile in isolation (100.0% self-time)
  pattern: x
  potential_impact: 10 ms (100.0%)
  
  
  ### Next steps
  pv_focus(p, "x")
  pv_gc_pressure(p)

pv_print_suggestions handles profile with truly no suggestions

Code
  pv_print_suggestions(p)
Output
  ## OPTIMIZATION SUGGESTIONS
  
  
  No suggestions.
  Run pv_help() to see all available functions.