discourse/script/diff_heaps.rb
Sam Saffron 30990006a9 DEV: enable frozen string literal on all files
This reduces chances of errors where consumers of strings mutate inputs
and reduces memory usage of the app.

Test suite passes now, but there may be some stuff left, so we will run
a few sites on a branch prior to merging
2019-05-13 09:31:32 +08:00

42 lines
957 B
Ruby

# frozen_string_literal: true
# to be used to compare ruby heaps generated in 2.1
# can isolate memory leaks
#
# rbtrace -p 15193 -e 'Thread.new{require "objspace"; ObjectSpace.trace_object_allocations_start; GC.start(full_mark: true); ObjectSpace.dump_all(output: File.open("heap.json","w"))}.join'
#
#
require 'set'
require 'json'
if ARGV.length != 2
puts "Usage: diff_heaps [ORIG.json] [AFTER.json]"
exit 1
end
origs = Set.new
File.open(ARGV[0], "r").each_line do |line|
parsed = JSON.parse(line)
origs << parsed["address"] if parsed && parsed["address"]
end
diff = []
File.open(ARGV[1], "r").each_line do |line|
parsed = JSON.parse(line)
if parsed && parsed["address"]
diff << parsed unless origs.include? parsed["address"]
end
end
diff.group_by do |x|
[x["type"], x["file"], x["line"]]
end.map { |x, y|
[x, y.count]
}.sort { |a, b|
b[1] <=> a[1]
}.each { |x, y|
puts "Leaked #{y} #{x[0]} objects at: #{x[1]}:#{x[2]}"
}