Initial benchmarks of Rack, Syro and Cuba.

benchmarks.rb

require "benchmark"

require "cuba"
require "syro"

class HelloWorld
  def call(env)
    if env['REQUEST_METHOD'] == 'GET' && env['PATH_INFO'] == '/foo/bar'
      [200, {"Content-Type" => "text/html"}, ["hello world"]]
    elsif env['REQUEST_METHOD'] == 'GET' && env['PATH_INFO'] == '/admin'
      [200, {"Content-Type" => "text/html"}, ["for admins"]]
    else
      [404, {"Content-Type" => "text/html"}, [""]]
    end
  end
end

RackApp = HelloWorld.new

class Admin < Cuba
  define do
    on root, get do
      res.write "for admins"
    end
  end
end

Cuba.define do
  on "foo/bar" do
    on root, get do
      res.write "hello world"
    end
  end

  on "admin" do
    run Admin
  end
end

admin = Syro.new {
  get {
    res.write("for admins")
  }
}

app = Syro.new {
  on("foo/bar") {
    get {
      res.write("hello world")
    }
  }

  on("admin") {
    run(admin)
  }
}

env1 = { "REQUEST_METHOD" => "GET", "PATH_INFO" => "/foo/bar",
        "SCRIPT_NAME" => "/" }

env2 = { "REQUEST_METHOD" => "GET", "PATH_INFO" => "/admin",
        "SCRIPT_NAME" => "/" }

N = 10000

Benchmark.bmbm { |x|
  x.report("Rack") {
    N.times {
      RackApp.call(env1)
    }
  }

  x.report("Cuba") {
    N.times {
      Cuba.call(env1)
    }
  }

  x.report("Syro") {
    N.times {
      app.call(env1)
    }
  }

  x.report("Rack/Admin") {
    N.times {
      RackApp.call(env2)
    }
  }

  x.report("Cuba/Admin") {
    N.times {
      Cuba.call(env2)
    }
  }

  x.report("Syro/Admin") {
    N.times {
      app.call(env2)
    }
  }
}

results.txt

:!ruby benchmarks.rb                                                                                                                                                 
Rehearsal ----------------------------------------------
Rack         0.020000   0.000000   0.020000 (  0.020291)
Cuba         0.380000   0.010000   0.390000 (  0.376348)
Syro         0.070000   0.000000   0.070000 (  0.068477)
Rack/Admin   0.020000   0.000000   0.020000 (  0.024030)
Cuba/Admin   0.620000   0.000000   0.620000 (  0.622762)
Syro/Admin   0.050000   0.000000   0.050000 (  0.050333)
------------------------------------- total: 1.170000sec

                 user     system      total        real
Rack         0.010000   0.000000   0.010000 (  0.017027)
Cuba         0.390000   0.000000   0.390000 (  0.391857)
Syro         0.060000   0.000000   0.060000 (  0.065231)
Rack/Admin   0.020000   0.000000   0.020000 (  0.022116)
Cuba/Admin   0.380000   0.000000   0.380000 (  0.383459)
Syro/Admin   0.040000   0.000000   0.040000 (  0.036940)

Calculating -------------------------------------
                Rack    33.295k i/100ms
                Cuba     2.067k i/100ms
                Syro    10.046k i/100ms
          Rack/Admin    28.234k i/100ms
          Cuba/Admin     1.326k i/100ms
          Syro/Admin    17.260k i/100ms
-------------------------------------------------
                Rack    558.293k (± 5.7%) i/s -      2.797M
                Cuba     22.669k (± 4.1%) i/s -    113.685k
                Syro    117.537k (± 4.9%) i/s -    592.714k
          Rack/Admin    422.478k (± 5.0%) i/s -      2.118M
          Cuba/Admin     20.848k (± 5.3%) i/s -    104.754k
          Syro/Admin    229.125k (± 4.7%) i/s -      1.156M

Comparison:
                Rack:   558293.5 i/s
          Rack/Admin:   422478.2 i/s - 1.32x slower
          Syro/Admin:   229124.8 i/s - 2.44x slower
                Syro:   117537.4 i/s - 4.75x slower
                Cuba:    22668.9 i/s - 24.63x slower
          Cuba/Admin:    20848.1 i/s - 26.78x slower