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bench some web microframeworks (Ruby)

Because we don't have enough drama, let's bench some hello world apps!

Why?

As part of some research, collected some benchmark around Ruby web microframeworks.

The idea is bench the performance from Rack, throught the stack of the framework to the minimum representation of an application (Hello World apps).

It is not the goal to bechmark hits to the database or external services, nor to do a silly fibonacci-as-a-service, ok?

What?

Rack 2 compatible frameworks

Please note that while Rails has been added to the list, it is just a minimalistic representation with ActionPack gem (using API and Metal, no full middleware stack, etc). You shouldn't take the performance numbers mentioned here about Rails (or any other) as scientific and decision-taking references.

How?

Used wrk to benchmark, locally, a burst of requests (in 2 threads) over 10 seconds. The command line used was:

$ wrk -t 2 http://localhost:9292/

All the frameworks using Puma on Ruby 2.4, in production mode with 16 threads:

$ puma -e production -t 16:16 apps/<framework.ru>

Run benchmark for all frameworks

# use `bundle exec`, if needed
$ bench/summary-memory
$ bench/summary-speed

Have some numbers around?

Yup, I do:

Requests/sec

<!-- speed_table --> 
Framework            Requests/sec  % from best
----------------------------------------------
rack                     15839.64      100.00%
watts                    13585.65       85.77%
syro                     13306.01       84.00%
roda                     11776.27       74.35%
cuba                     11501.96       72.62%
rack-response            11480.11       72.48%
hobbit                   11140.22       70.33%
hobby                    10606.80       66.96%
hanami-router            10247.61       64.70%
newark                    8896.35       56.17%
rambutan                  8466.83       53.45%
plezi                     8240.07       52.02%
rackstep                  8187.32       51.69%
rack-app                  7473.52       47.18%
rails-metal               6598.65       41.66%
flame                     5454.46       34.44%
sinatra                   3977.30       25.11%
grape                     2937.03       18.54%
rails-api                 1211.33        7.65%
<!-- speed_table_end -->

Memory Allocation/Request

<!-- mem_table --> 
Framework       Allocs/Req Memsize/Req
--------------------------------------
rack                    41        2920
roda                    45        3608
syro                    45        3608
cuba                    47        3688
watts                   48        3200
hobbit                  49        3928
hobby                   53        4240
rack-response           56        4136
rails-metal             60        5728
plezi                   66        5040
hanami-router           68        4880
newark                  72        5928
rackstep                81        4944
rack-app                83        7184
rambutan                83        5944
flame                  125        8536
sinatra                191       12512
grape                  272       20800
rails-api              385       28017
<!-- mem_table_end -->

Hardware

These numbers were collected on: