Generate gem size metrics in memory CI

This includes several changes:
  - Rename memory-static to generate-gems-size-metrics-static
  - Rename memory-static-objects to generate-gems-memory-metrics-static
  - Change generate-gems-size-metrics-static interface. The script now
    expect `bundle exec derailed bundle:mem` output as its input. The
    script output to stdout, or stderr for error message.
  - Change generate-gems-memory-metrics-static interface. The script now
    expect `bundle exec derailed bundle:objects` output as its input.
    The script output to stdout, or stderr for error message.
  - Generate gem size metrics. Script generate-gems-size-metrics-static
    extract each gem size from `bundle exec derailed bundle:mem` output.
    Save output to metrics file in format: 'gem_size_mb{name="zip"} 0.5'

1 files changed, 18 insertions, 0 deletions

diff --git a/scripts/generate-gems-memory-metrics-static b/scripts/generate-gems-memory-metrics-static
new file mode 100755
index 00000000000..aa7ce3615bf
--- /dev/null
+++ b/scripts/generate-gems-memory-metrics-static
@@ -0,0 +1,18 @@
+#!/usr/bin/env ruby
+
+abort "usage: #{__FILE__} <memory_bundle_objects_file_name>" unless ARGV.length == 1
+memory_bundle_objects_file_name = ARGV.first
+
+full_report = File.readlines(memory_bundle_objects_file_name)
+
+allocated_str = full_report[1]
+retained_str = full_report[2]
+allocated_stats = /Total allocated: (?<bytes>.*) bytes \((?<objects>.*) objects\)/.match(allocated_str)
+retained_stats = /Total retained: (?<bytes>.*) bytes \((?<objects>.*) objects\)/.match(retained_str)
+
+abort 'failed to process the benchmark output' unless allocated_stats && retained_stats
+
+puts "memory_static_objects_allocated_mb #{(allocated_stats[:bytes].to_f / (1024 * 1024)).round(1)}"
+puts "memory_static_objects_retained_mb #{(retained_stats[:bytes].to_f / (1024 * 1024)).round(1)}"
+puts "memory_static_objects_allocated_items #{allocated_stats[:objects]}"
+puts "memory_static_objects_retained_items #{retained_stats[:objects]}"