Drop memory-static job code

The job was already disabled because it causes intermittent SIGSEGV.
It also could be replaced by the memory-on-boot which would
hit the application with the request first.

.gitlab/ci/memory.gitlab-ci.yml

@@ -11,36 +11,9 @@
       metrics: "${METRICS_FILE}"
     expire_in: 31d
 
-# Disabled since it causes intermittent SIGSEGV in CI:
-# https://gitlab.com/gitlab-org/gitlab/-/issues/350296
-.memory-static:
-  extends: .only-code-memory-job-base
-  stage: test
-  needs: ["setup-test-env"]
-  variables:
-    SETUP_DB: "false"
-    MEMORY_BUNDLE_MEM_FILE: "tmp/memory_bundle_mem.txt"
-    MEMORY_BUNDLE_OBJECTS_FILE: "tmp/memory_bundle_objects.txt"
-  script:
-    # Uses two different reports from the 'derailed_benchmars' gem.
-
-    # Loads each of gems in the Gemfile and checks how much memory they consume when they are required.
-    # 'derailed_benchmarks' internally uses 'get_process_mem'
-    - bundle exec derailed bundle:mem > "${MEMORY_BUNDLE_MEM_FILE}"
-    - scripts/generate-gems-size-metrics-static "${MEMORY_BUNDLE_MEM_FILE}" >> "${METRICS_FILE}"
-
-    # Outputs detailed information about objects created while gems are loaded.
-    # 'derailed_benchmarks' internally uses 'memory_profiler'
-    - bundle exec derailed bundle:objects > "${MEMORY_BUNDLE_OBJECTS_FILE}"
-    - scripts/generate-gems-memory-metrics-static "${MEMORY_BUNDLE_OBJECTS_FILE}" >> "${METRICS_FILE}"
-  artifacts:
-    paths:
-      - "${METRICS_FILE}"
-      - "${MEMORY_BUNDLE_MEM_FILE}"
-      - "${MEMORY_BUNDLE_OBJECTS_FILE}"
 
 # Show memory usage caused by invoking require per gem.
-# Unlike `memory-static`, it hits the app with one request to ensure that any last minute require-s have been called.
+# Hits the app with one request to ensure that any last minute require-s have been called.
 # The application is booted in `production` environment.
 # All tests are run without a webserver (directly using Rack::Mock by default).
 memory-on-boot:

scripts/generate-gems-memory-metrics-static

-#!/usr/bin/env ruby
-# frozen_string_literal: true
-
-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]}"

scripts/generate-gems-size-metrics-static

-#!/usr/bin/env ruby
-# frozen_string_literal: true
-
-abort "usage: #{__FILE__} <memory_bundle_mem_file_name>" unless ARGV.length == 1
-memory_bundle_mem_file_name = ARGV.first
-
-full_report = File.readlines(memory_bundle_mem_file_name)
-
-def total_size(memory_bundle_mem_report)
-  stats = /TOP: (?<total_mibs_str>.*) MiB/.match(memory_bundle_mem_report.first)
-  abort 'failed to process the benchmark output' unless stats
-  "gem_total_size_mb #{stats[:total_mibs_str].to_f.round(1)}"
-end
-
-TOP_LEVEL_GEM_LOG_FORMAT = /^  (?<gem_name>\S.*):\s*(?<gem_size>\d[.\d]*)\s*MiB/.freeze
-def all_gems(memory_bundle_mem_report)
-  memory_bundle_mem_report.map do |line|
-    TOP_LEVEL_GEM_LOG_FORMAT.match(line)
-  end.compact
-end
-
-def gems_as_metrics(gems_match_data)
-  gems_match_data.map do |gem|
-    gem_name = gem[:gem_name]
-    gem_size_mb = gem[:gem_size].to_f.round(1)
-    "gem_size_mb{name=\"#{gem_name}\"} #{gem_size_mb}"
-  end
-end
-
-puts total_size(full_report)
-puts gems_as_metrics(all_gems(full_report)).sort(&:casecmp)