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The issue:

..mobile browsers will wait approximately 300ms from the time that you tap the button to fire the click event. The reason for this is that the browser is waiting to see if you are actually performing a double tap.

(from a new defunct https://developers.google.com/mobile/articles/fast_buttons article)

touch-action CSS property can be used to disable this behaviour.

touch-action: manipulation The user agent may consider touches that begin on the element only for the purposes of scrolling and continuous zooming. Any additional behaviors supported by auto are out of scope for this specification.

Interactive Machine Learning

Taught by Brad Knox at the MIT Media Lab in 2014. Course website. Lecture and visiting speaker notes.

@schneems
schneems / command-line-only-objectspace-trace.sh
Last active March 27, 2025 01:56
trace where Ruby objects come from with this handy bash 3 liner
echo 'require "objspace"; ObjectSpace.trace_object_allocations_start; Kernel.send(:define_method, :sup) do |obj| ; puts "#{ ObjectSpace.allocation_sourcefile(obj) }:#{ ObjectSpace.allocation_sourceline(obj) }"; end' > tmp/tmp-gemfile
cat Gemfile >> tmp/tmp-gemfile
cat tmp/tmp-gemfile > Gemfile
# $ bundle exec irb
# irb(main):001:0> require 'rails'
# => true
# irb(main):002:0> sup(Rails)
# /Users/richardschneeman/.gem/ruby/2.4.0/gems/railties-5.0.0.1/lib/rails/initializable.rb:3