Class: Peek::Views::Memory

Inherits:
View
  • Object
show all
Defined in:
lib/peek/views/memory.rb

Constant Summary collapse

MEM_TOTAL_LABEL =
'Total'
MEM_OBJECTS_LABEL =
'Objects allocated'
MEM_MALLOCS_LABEL =
'Allocator calls'
MEM_BYTES_LABEL =
'Large allocations'

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Memory

Returns a new instance of Memory.


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# File 'lib/peek/views/memory.rb', line 11

def initialize(options = {})
  super

  @thread_memory = {}
end

Instance Method Details

#resultsObject


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# File 'lib/peek/views/memory.rb', line 17

def results
  return thread_memory if thread_memory.empty?

  {
    calls: byte_string(thread_memory[:mem_total_bytes]),
    summary: {
      MEM_OBJECTS_LABEL => number_string(thread_memory[:mem_objects]),
      MEM_MALLOCS_LABEL => number_string(thread_memory[:mem_mallocs]),
      MEM_BYTES_LABEL => byte_string(thread_memory[:mem_bytes])
    },
    details: [
      {
        item_header: MEM_TOTAL_LABEL,
        item_content: "Total memory use of this request. This includes both occupancy of existing heap slots " \
                      "as well as newly allocated memory due to large objects. Not adjusted for freed memory. " \
                      "Lower is better."
      },
      {
        item_header: MEM_OBJECTS_LABEL,
        item_content: "Total number of objects allocated by the Ruby VM during this request. " \
                      "Not adjusted for objects that were freed again. Lower is better."
      },
      {
        item_header: MEM_MALLOCS_LABEL,
        item_content: "Total number of times Ruby had to call `malloc`, the C memory allocator. " \
                      "This is necessary for objects that are too large to fit into a 40 Byte slot in Ruby's managed heap. " \
                      "Lower is better."
      },
      {
        item_header: MEM_BYTES_LABEL,
        item_content: "Memory allocated for objects that did not fit into a heap slot. " \
                      "Not adjusted for memory that was freed again. Lower is better."
      }
    ]
  }
end