When developing a program in Ruby, you may sometimes encounter a memory leak. For a while now, Ruby has a facility to gather information about what objects are laying around: ObjectSpace.
There are several approaches one can take to debug a leak. This discusses a time-based approach, where a full memory dump is generated every, say, 5 minutes, during a time that the memory leak is showing up. Afterwards, one can look at all the objects, and find out which ones are staying around, causing the
| #!/bin/env ruby | |
| # lazy hack from Robert Klemme | |
| module Memory | |
| # sizes are guessed, I was too lazy to look | |
| # them up and then they are also platform | |
| # dependent | |
| REF_SIZE = 4 # ? | |
| OBJ_OVERHEAD = 4 # ? |
| =Navigating= | |
| visit('/projects') | |
| visit(post_comments_path(post)) | |
| =Clicking links and buttons= | |
| click_link('id-of-link') | |
| click_link('Link Text') | |
| click_button('Save') | |
| click('Link Text') # Click either a link or a button | |
| click('Button Value') |
| const sanityClient = require('@sanity/client'); | |
| const crypto = require('crypto'); | |
| const { | |
| SANITY_API_TOKEN, | |
| SANITY_PROJECT_ID, | |
| SANITY_DATASET, | |
| SHOPIFY_SECRET | |
| } = process.env; |
| // Modified from @mutsuda's https://medium.com/@mutsuda/create-an-ios-widget-showing-google-spreadsheets-data-856767a9447e | |
| // Modified from @levelsio's https://gist.github.com/levelsio/a1ca0dd434b77ef26f6a7c403beff4d0 | |
| // By @daolf | |
| // Prerequisite: install Scriptable @ https://apps.apple.com/us/app/scriptable/id1405459188 | |
| const API_TOKEN = "CHARTMOGUL_TOKEN" | |
| const API_SECRET = "CHARTMOGUL_SECRET" | |
| // Recreating a basic auth with Scriptable lib |
| # gem "ruby-prof" | |
| around_filter :profiler | |
| def profiler(&block) | |
| data = RubyProf::Profile.profile(&block) | |
| filepath = Rails.root.join("tmp", "profiler.html") | |
| File.open(filepath, "w") do |f| | |
| RubyProf::CallStackPrinter.new(data).print(f) |
