The andpush gem (https://github.com/yuki24/andpush) vs the fcm gem (https://github.com/spacialdb/fcm)

andpush_vs_fcm.rb

require 'benchmark/ips'
require 'andpush'
require 'fcm'

server_key   = ENV.fetch('FCM_TEST_SERVER_KEY')
DEVICE_TOKEN = ENV.fetch('FCM_TEST_REGISTRATION_TOKEN')

FCM_CLIENT      = FCM.new(server_key)
PAYLOAD_FOR_FCM = { dry_run: true, notification: { title: "u", body: "y" } }

ANDPUSH_CLIENT      = Andpush.build(server_key)
PAYLOAD_FOR_ANDPUSH = PAYLOAD_FOR_FCM.merge(to: DEVICE_TOKEN)

REGISTRATION_TOKENS = [DEVICE_TOKEN]

Benchmark.ips do |x|
  x.report("andpush") { ANDPUSH_CLIENT.push(PAYLOAD_FOR_ANDPUSH).json }
  x.report("fcm")     { FCM_CLIENT.send(REGISTRATION_TOKENS, PAYLOAD_FOR_FCM) }

  x.compare!
end

result.txt

Warming up --------------------------------------
             andpush     2.000  i/100ms
                 fcm     1.000  i/100ms
Calculating -------------------------------------
             andpush     28.009  (± 7.1%) i/s -    140.000  in   5.019399s
                 fcm      7.452  (±13.4%) i/s -     37.000  in   5.023139s

Comparison:
             andpush:       28.0 i/s
                 fcm:        7.5 i/s - 3.76x  slower