Each dot in the visualization above represents the resources that Pagy consumes for one full rendering. The other gems consume hundreds of times as much for the same rendering.

The IPS/Kb ratio is calculated out of speed (IPS) and Memory (Kb): it shows how well each gem uses each Kb of memory it allocates/consumes.

Notice: the above charts refers to the comparison of the basic pagy v3.0.0 helper with will_paginate v3.1.7 and kaminari v1.1.1.

While it's not up-to-date, you can expect roughly similar results with the latest versions, maybe a bit less dramatic in performance due to the multiple features added to pagy since v3 (e.g. customizable and translated aria-labels). However, consider that the difference become A LOT bigger in favor of pagy if you use *nav_js helpers, Pagy::Countless or JSON and client side pagination that are not part of the comparison because missing in the other gems.

See the Detailed Gems Comparison for full details.

• Pagy has a very slim core code very easy to understand and use.
• It has a quite fat set of optional extras that you can explicitly require for very efficient and modular customization ( see extras)
• It has no dependencies: it produces its own HTML, URLs, i18n with its own specialized and fast code
• Its methods are accessible and overridable right where you use them (no pesky monkey-patching needed)

• Pagy is very modular and does not load any unnecessary code ( see why...)_
• It doesn't impose limits even with collections|scopes that already used limit and offset ( see how...)
• It raises Pagy::OverflowError exceptions that you can rescue from ( see how...) or use the overflow extra for a few ready to use common behaviors
• It does not impose any difficult-to-override logic or output

# Include it in the controllers (e.g. application_controller.rb)
include Pagy::Backend

# Include it in the helpers (e.g. application_helper.rb)
include Pagy::Frontend

# Wrap your collections with pagy in your actions
@pagy, @records = pagy(Product.all)

Optionally set your defaults in the pagy initializer:

# Optionally override some pagy default with your own in the pagy initializer
Pagy::DEFAULT[:items] = 10 # items per page
Pagy::DEFAULT[:size]  = [1, 4, 4, 1] # nav bar links
# Better user experience handled automatically
require 'pagy/extras/overflow'
Pagy::DEFAULT[:overflow] = :last_page

<%# Render a view helper in your views (skipping nav links for empty pages) %>
<%== pagy_nav(@pagy) if @pagy.pages > 1 %>

Or, choose from the following view helpers:

View Helper Name	Preview (Bootstrap Style shown)
pagy_nav(@pagy)
pagy_nav_js(@pagy)
pagy_info(@pagy)
pagy_combo_nav_js(@pagy)
pagy_items_selector_js
pagy_nav(@calendar[:year]) pagy_nav(@calendar[:month]) (other units: :quarter, :week, :day and custom)

(See the Quick Start)

# Require a CSS framework extra in the pagy initializer (e.g. bootstrap)
require 'pagy/extras/bootstrap'

<%# Use it in your views %>
<%== pagy_bootstrap_nav(@pagy) %>

(See all the CSS Framework Extras)

# Require some special backend extra in the pagy initializer (e.g. elasticsearch_rails)
require 'pagy/extras/elasticsearch_rails'

# Extend your models (e.g. application_record.rb)
extend Pagy::ElasticsearchRails

# Use it in your actions
response         = Article.pagy_search(params[:q])
@pagy, @response = pagy_elasticsearch_rails(response)

(See all the Search Extras)

# Require the metadata extra in the pagy initializer
require 'pagy/extras/metadata'

# Use it in your actions
pagy, records = pagy(Product.all)
render json: { data: records,
               pagy: pagy_metadata(pagy) }

(See all the Backend Tools)

# Require the headers extra in the pagy initializer
require 'pagy/extras/headers'

# Use it in your actions
pagy, records = pagy(Product.all)
pagy_headers_merge(pagy)
render json: records

(See all the Backend Tools)

# Require the jsonapi extra in the pagy initializer
require 'pagy/extras/jsonapi'

# Use it in your actions
pagy, records = pagy(Product.all)
render json: { data:  records,
               links: pagy_jsonapi_links(pagy) }
# besides the query params will be nested. E.g.: ?page[number]=2&page[size]=100

(See all the Backend Tools)

Extras add special options and manage different components, behaviors, Frontend or Backend environments... usually by just requiring them (and optionally overriding some default).

• arel: Provides better performance of grouped ActiveRecord collections
• array: Paginate arrays efficiently.
• calendar: Add pagination filtering by calendar time unit (year, quarter, month, week, day, custom)
• countless: Paginate without the need of any count, saving one query per rendering
• elasticsearch_rails: Paginate ElasticsearchRails response objects
• headers: Add RFC-8288 compliant http response headers (and other helpers) useful for API pagination
• jsonapi: Implement the JSON:API specifications for pagination
• meilisearch: Paginate Meilisearch results
• metadata: Provides the pagination metadata to Javascript frameworks like Vue.js, react.js, etc.
• searchkick: Paginate Searchkick::Results objects

• bootstrap: Add nav helpers for the Bootstrap pagination component
• bulma: Add nav helpers for the Bulma CSS pagination component
• foundation: Add nav helpers for the Foundation pagination component
• materialize: Add nav helpers for the Materialize CSS pagination component
• pagy: Adds the pagy styled versions of the javascript-powered nav helpers and other components to support countless or navless pagination (incremental, auto-incremental, infinite pagination).
• semantic: Add nav helpers for the Semantic UI CSS pagination component
• tailwind: Ready to use style snippet for Tailwind CSS
• uikit: Add nav helpers for the UIkit pagination component

• Pagy::Console: Use pagy in the irb/rails console even without any app nor configuration
• gearbox: Automatically change the number of items per page depending on the page number
• i18n: Use the I18n gem instead of the faster pagy-i18n implementation
• items: Allow the client to request a custom number of items per page with an optional selector UI
• overflow: Allow easy handling of overflowing pages
• standalone: Use pagy without any request object, nor Rack environment/gem, nor any defined params method
• trim: Remove the page=1 param from the first page link

• Pull Requests are welcome!
• Please base your PR against the master branch.
• For simple contribution you can quickly check your changes with one of the apps in the Pagy Playground and/or the Pagy::Console.
• If you Create A Pull Request, please ensure that the "All checks have passed" indicator gets green light on the Pull Request page (if it's not enabled, a maintainer will enable it for you).

• Pagy follows the Semantic Versioning 2.0.0. Please, check the Changelog for breaking changes introduced by mayor versions. Using pessimistic version constraint in your Gemfile will ensure smooth upgrades.

• The master branch is the latest rubygem-published release. It also contains docs and comment changes that don't affect the published code. It is never force-pushed.
• The dev branch is the development branch with the new code that will be merged in the next release. It could be force-pushed.
• Expect any other branch to be internal, experimental, force-pushed, rebased and/or deleted even without merging.