diff --git a/experiments/Gemfile b/experiments/Gemfile
new file mode 100644
index 0000000..118b75d
--- /dev/null
+++ b/experiments/Gemfile
@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+source 'https://rubygems.org/'
+
+ruby '~> 3.3'
+
+gem 'puma', git: 'https://github.com/dsalahutdinov/puma.git', branch: :add_preprocess_time
+gem 'rack'
+gem 'rackup'
+gem 'yabeda-prometheus-mmap'
+gem 'yabeda-puma-plugin', path: '/yabeda-puma-plugin'
diff --git a/experiments/README.md b/experiments/README.md
new file mode 100644
index 0000000..7a7b648
--- /dev/null
+++ b/experiments/README.md
@@ -0,0 +1,24 @@
+Navigate to experiments directory:
+```sh
+cd experiments
+```
+
+Setup environment
+```sh
+docker-compose run app bundle
+
+docker-compose up grafana promethes app
+```
+
+To run stress-test:
+
+```sh
+docker-compose run k6
+```
+
+Navagate to grafana http://localhost:3000 to "Puma experimental" dashboard.
+
+See results:
+
+![Results](docs/puma-requests_wait_time.png)
+
diff --git a/experiments/config.ru b/experiments/config.ru
new file mode 100644
index 0000000..91f2838
--- /dev/null
+++ b/experiments/config.ru
@@ -0,0 +1,8 @@
+require 'rack'
+
+run do |_env|
+  # do some hard work
+  number = (0..9_999_990).to_a.map { |i| i * 2 }.sum
+
+  [200, {}, ["Result #{number}"]]
+end
diff --git a/experiments/docker-compose.yml b/experiments/docker-compose.yml
new file mode 100644
index 0000000..b57c4aa
--- /dev/null
+++ b/experiments/docker-compose.yml
@@ -0,0 +1,84 @@
+x-app-resources: &x-app-resources
+  deploy:
+    resources:
+      reservations:
+        cpus: '1'
+        memory: 512M
+      limits:
+        cpus: '1'
+        memory: 512M
+
+x-app-service-template: &ruby-app
+  image: ruby:3.3
+  environment:
+    HISTFILE: /app/tmp/.bash_history
+    BUNDLE_PATH: /usr/local/bundle
+    BUNDLE_CONFIG: /app/.bundle/config
+    prometheus_multiproc_dir: /tmp
+  stdin_open: true
+  tty: true
+  working_dir: /app
+#  tmpfs:
+#    - /tmp
+
+services:
+  app:
+    <<:
+      - *ruby-app
+      - *x-app-resources
+    command: bundle exec puma -t 16 -w 4 -C puma.rb
+    volumes:
+      - bundler_data:/usr/local/bundle
+      - .:/app:cached
+      - ..:/yabeda-puma-plugin
+
+  k6:
+    image: grafana/k6
+    command: run /app/k6.js
+    profiles: [manual-run]
+    volumes:
+      - .:/app:cached
+    sysctls:
+      - net.ipv4.tcp_tw_reuse=1
+
+  prometheus:
+    image: prom/prometheus:v2.17.1
+    container_name: prometheus
+    volumes:
+      - ./prometheus:/etc/prometheus
+      - prometheus_data:/prometheus
+    command:
+      - '--config.file=/etc/prometheus/prometheus.yml'
+      - '--storage.tsdb.path=/prometheus'
+      - '--web.console.libraries=/etc/prometheus/console_libraries'
+      - '--web.console.templates=/etc/prometheus/consoles'
+      - '--storage.tsdb.retention.time=200h'
+      - '--web.enable-lifecycle'
+    restart: unless-stopped
+    expose:
+      - 9090
+    depends_on:
+     - app
+
+  grafana:
+    image: grafana/grafana:11.2.2-security-01
+    container_name: grafana
+    volumes:
+      - grafana_data:/var/lib/grafana
+      - ./grafana/provisioning:/etc/grafana/provisioning
+    environment:
+      - GF_SECURITY_ADMIN_USER=admin
+      - GF_SECURITY_ADMIN_PASSWORD=password
+      - GF_USERS_ALLOW_SIGN_UP=false
+    restart: unless-stopped
+    expose:
+      - 3000
+    ports:
+     - "3000:3000"
+    depends_on:
+     - prometheus
+
+volumes:
+  bundler_data:
+  prometheus_data:
+  grafana_data:
diff --git a/experiments/grafana/provisioning/dashboards/dashboard.yml b/experiments/grafana/provisioning/dashboards/dashboard.yml
new file mode 100644
index 0000000..4c387ae
--- /dev/null
+++ b/experiments/grafana/provisioning/dashboards/dashboard.yml
@@ -0,0 +1,12 @@
+apiVersion: 1
+
+providers:
+  - name: 'Prometheus'
+    orgId: 1
+    folder: ''
+    type: file
+    disableDeletion: false
+    editable: true
+    allowUiUpdates: true
+    options:
+      path: /etc/grafana/provisioning/dashboards
diff --git a/experiments/grafana/provisioning/dashboards/puma.json b/experiments/grafana/provisioning/dashboards/puma.json
new file mode 100644
index 0000000..507e7f0
--- /dev/null
+++ b/experiments/grafana/provisioning/dashboards/puma.json
@@ -0,0 +1,344 @@
+{
+  "annotations": {
+    "list": [
+      {
+        "builtIn": 1,
+        "datasource": {
+          "type": "grafana",
+          "uid": "-- Grafana --"
+        },
+        "enable": true,
+        "hide": true,
+        "iconColor": "rgba(0, 211, 255, 1)",
+        "name": "Annotations & Alerts",
+        "type": "dashboard"
+      }
+    ]
+  },
+  "editable": true,
+  "fiscalYearStartMonth": 0,
+  "graphTooltip": 0,
+  "id": 1,
+  "links": [],
+  "panels": [
+    {
+      "datasource": {
+        "default": true,
+        "type": "prometheus",
+        "uid": "PBFA97CFB590B2093"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "palette-classic"
+          },
+          "custom": {
+            "axisBorderShow": false,
+            "axisCenteredZero": false,
+            "axisColorMode": "text",
+            "axisLabel": "",
+            "axisPlacement": "auto",
+            "barAlignment": 0,
+            "barWidthFactor": 0.6,
+            "drawStyle": "line",
+            "fillOpacity": 0,
+            "gradientMode": "none",
+            "hideFrom": {
+              "legend": false,
+              "tooltip": false,
+              "viz": false
+            },
+            "insertNulls": false,
+            "lineInterpolation": "linear",
+            "lineWidth": 1,
+            "pointSize": 5,
+            "scaleDistribution": {
+              "type": "linear"
+            },
+            "showPoints": "auto",
+            "spanNulls": false,
+            "stacking": {
+              "group": "A",
+              "mode": "none"
+            },
+            "thresholdsStyle": {
+              "mode": "off"
+            }
+          },
+          "mappings": [],
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "green"
+              },
+              {
+                "color": "red",
+                "value": 80
+              }
+            ]
+          },
+          "unit": "reqps"
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 6,
+        "w": 24,
+        "x": 0,
+        "y": 0
+      },
+      "id": 1,
+      "options": {
+        "legend": {
+          "calcs": [],
+          "displayMode": "list",
+          "placement": "bottom",
+          "showLegend": true
+        },
+        "tooltip": {
+          "mode": "single",
+          "sort": "none"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "PBFA97CFB590B2093"
+          },
+          "disableTextWrap": false,
+          "editorMode": "code",
+          "expr": "sum(rate(puma_requests_count[1m]))",
+          "fullMetaSearch": false,
+          "includeNullMetadata": true,
+          "instant": false,
+          "legendFormat": "__auto",
+          "range": true,
+          "refId": "A",
+          "useBackend": false
+        }
+      ],
+      "title": "Puma RPS",
+      "type": "timeseries"
+    },
+    {
+      "datasource": {
+        "default": true,
+        "type": "prometheus",
+        "uid": "PBFA97CFB590B2093"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "palette-classic"
+          },
+          "custom": {
+            "axisBorderShow": false,
+            "axisCenteredZero": false,
+            "axisColorMode": "text",
+            "axisLabel": "",
+            "axisPlacement": "auto",
+            "barAlignment": 0,
+            "barWidthFactor": 0.6,
+            "drawStyle": "line",
+            "fillOpacity": 0,
+            "gradientMode": "none",
+            "hideFrom": {
+              "legend": false,
+              "tooltip": false,
+              "viz": false
+            },
+            "insertNulls": false,
+            "lineInterpolation": "linear",
+            "lineWidth": 1,
+            "pointSize": 5,
+            "scaleDistribution": {
+              "type": "linear"
+            },
+            "showPoints": "auto",
+            "spanNulls": false,
+            "stacking": {
+              "group": "A",
+              "mode": "none"
+            },
+            "thresholdsStyle": {
+              "mode": "off"
+            }
+          },
+          "mappings": [],
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "green"
+              },
+              {
+                "color": "red",
+                "value": 80
+              }
+            ]
+          },
+          "unit": "none"
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 7,
+        "w": 24,
+        "x": 0,
+        "y": 6
+      },
+      "id": 3,
+      "options": {
+        "legend": {
+          "calcs": [],
+          "displayMode": "list",
+          "placement": "bottom",
+          "showLegend": true
+        },
+        "tooltip": {
+          "mode": "single",
+          "sort": "none"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "PBFA97CFB590B2093"
+          },
+          "disableTextWrap": false,
+          "editorMode": "code",
+          "expr": "sum (puma_backlog)",
+          "fullMetaSearch": false,
+          "includeNullMetadata": true,
+          "instant": false,
+          "legendFormat": "__auto",
+          "range": true,
+          "refId": "A",
+          "useBackend": false
+        }
+      ],
+      "title": "Backlog size",
+      "type": "timeseries"
+    },
+    {
+      "datasource": {
+        "default": true,
+        "type": "prometheus",
+        "uid": "PBFA97CFB590B2093"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "palette-classic"
+          },
+          "custom": {
+            "axisBorderShow": false,
+            "axisCenteredZero": false,
+            "axisColorMode": "text",
+            "axisLabel": "",
+            "axisPlacement": "auto",
+            "barAlignment": 0,
+            "barWidthFactor": 0.6,
+            "drawStyle": "line",
+            "fillOpacity": 0,
+            "gradientMode": "none",
+            "hideFrom": {
+              "legend": false,
+              "tooltip": false,
+              "viz": false
+            },
+            "insertNulls": false,
+            "lineInterpolation": "linear",
+            "lineWidth": 1,
+            "pointSize": 5,
+            "scaleDistribution": {
+              "type": "linear"
+            },
+            "showPoints": "auto",
+            "spanNulls": false,
+            "stacking": {
+              "group": "A",
+              "mode": "none"
+            },
+            "thresholdsStyle": {
+              "mode": "off"
+            }
+          },
+          "mappings": [],
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "green"
+              },
+              {
+                "color": "red",
+                "value": 80
+              }
+            ]
+          },
+          "unit": "ms"
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 8,
+        "w": 24,
+        "x": 0,
+        "y": 13
+      },
+      "id": 2,
+      "options": {
+        "legend": {
+          "calcs": [],
+          "displayMode": "list",
+          "placement": "bottom",
+          "showLegend": true
+        },
+        "tooltip": {
+          "mode": "single",
+          "sort": "none"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "PBFA97CFB590B2093"
+          },
+          "disableTextWrap": false,
+          "editorMode": "code",
+          "expr": "sum(rate(puma_requests_wait_time[1m])) / sum(rate(puma_requests_count[1m]))",
+          "fullMetaSearch": false,
+          "includeNullMetadata": true,
+          "instant": false,
+          "legendFormat": "__auto",
+          "range": true,
+          "refId": "A",
+          "useBackend": false
+        }
+      ],
+      "title": "AVG request wait_time",
+      "type": "timeseries"
+    }
+  ],
+  "refresh": "",
+  "schemaVersion": 39,
+  "tags": [],
+  "templating": {
+    "list": []
+  },
+  "time": {
+    "from": "2024-11-21T11:24:47.548Z",
+    "to": "2024-11-21T11:33:10.250Z"
+  },
+  "timepicker": {},
+  "timezone": "browser",
+  "title": "Puma Experimental",
+  "uid": "ce4m4u99tleyoc",
+  "version": 2,
+  "weekStart": ""
+}
diff --git a/experiments/grafana/provisioning/datasources/datasource.yml b/experiments/grafana/provisioning/datasources/datasource.yml
new file mode 100644
index 0000000..a08624a
--- /dev/null
+++ b/experiments/grafana/provisioning/datasources/datasource.yml
@@ -0,0 +1,11 @@
+apiVersion: 1
+
+datasources:
+  - name: Prometheus
+    type: prometheus
+    access: proxy
+    orgId: 1
+    url: http://prometheus:9090
+    basicAuth: false
+    isDefault: true
+    editable: true
diff --git a/experiments/k6.js b/experiments/k6.js
new file mode 100644
index 0000000..437d100
--- /dev/null
+++ b/experiments/k6.js
@@ -0,0 +1,17 @@
+import http from 'k6/http';
+export const options = {
+  stages: [
+//    { duration: '30s', target: 1000 },
+    { duration: '300s', target: 3000 },
+//    { duration: '10s', target: 750 },
+//    { duration: '10s', target: 500 },
+//    { duration: '10s', target: 0 },
+  ],
+};
+
+
+export default function () {
+  for (let id = 1; id <= 100; id++) {
+    http.get("http://app:9292/");
+  }
+}
diff --git a/experiments/prometheus/prometheus.yml b/experiments/prometheus/prometheus.yml
new file mode 100644
index 0000000..1e0cf3c
--- /dev/null
+++ b/experiments/prometheus/prometheus.yml
@@ -0,0 +1,19 @@
+global:
+  scrape_interval:     5s
+  evaluation_interval: 5s
+
+  # Attach these labels to any time series or alerts when communicating with
+  # external systems (federation, remote storage, Alertmanager).
+  external_labels:
+      monitor: 'docker-host-alpha'
+
+# Load and evaluate rules in this file every 'evaluation_interval' seconds.
+rule_files:
+  - "alert.rules"
+
+# A scrape configuration containing exactly one endpoint to scrape.
+scrape_configs:
+  - job_name: 'client'
+    scrape_interval: 5s
+    static_configs:
+      - targets: ['app:9394']
diff --git a/experiments/puma-request_wait_time.png b/experiments/puma-request_wait_time.png
new file mode 100644
index 0000000..4d6523b
Binary files /dev/null and b/experiments/puma-request_wait_time.png differ
diff --git a/experiments/puma.rb b/experiments/puma.rb
new file mode 100644
index 0000000..6dcc82b
--- /dev/null
+++ b/experiments/puma.rb
@@ -0,0 +1,10 @@
+require 'yabeda/prometheus/mmap'
+require 'yabeda/puma/plugin'
+
+before_fork do
+  Yabeda.configure!
+end
+
+activate_control_app 'unix:///var/run/pumactl.sock'
+plugin :yabeda
+plugin :yabeda_prometheus