diff --git a/Dockerfile b/Dockerfile
index 327d1a1e1..d545f1d84 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -56,7 +56,9 @@ ENV LANG="en_US.UTF-8" \
     MYSQL_DATABASE="azuracast" \
     PREFER_RELEASE_BUILDS="false" \
     COMPOSER_PLUGIN_MODE="false" \
-    ADDITIONAL_MEDIA_SYNC_WORKER_COUNT=0
+    ADDITIONAL_MEDIA_SYNC_WORKER_COUNT=0 \
+    PROFILING_EXTENSION_ENABLED=0 \
+    PROFILING_EXTENSION_ALWAYS_ON=0
 
 # Entrypoint and default command
 ENTRYPOINT ["/usr/local/bin/uptime_wait"]
diff --git a/azuracast.dev.env b/azuracast.dev.env
index 2b1e8a14e..26231dce4 100644
--- a/azuracast.dev.env
+++ b/azuracast.dev.env
@@ -63,3 +63,21 @@ MYSQL_SLOW_QUERY_LOG=1
 # if you are seeing the `Too many connections` error in the logs.
 # Default: 100
 MYSQL_MAX_CONNECTIONS=100
+
+# Enable the profiling extension.
+# Profiling data can be viewed by visiting http://your-azuracast-site/?SPX_KEY=dev&SPX_UI_URI=/
+# Default: 0
+PROFILING_EXTENSION_ENABLED=1
+
+# Profile ALL requests made to this account.
+# This will have significant performance impact on your installation and should only be used in test circumstances.
+# Default: 0
+PROFILING_EXTENSION_ALWAYS_ON=0
+
+# Configure the value for the SPX_KEY parameter needed to access the profiling dashboard
+# Default: dev
+PROFILING_EXTENSION_HTTP_KEY=dev
+
+# Configure the IP whitelist for the profiling dashboard
+# Default: *
+PROFILING_EXTENSION_HTTP_IP_WHITELIST=*
diff --git a/azuracast.sample.env b/azuracast.sample.env
index 9e8cd4325..a7bcffd45 100644
--- a/azuracast.sample.env
+++ b/azuracast.sample.env
@@ -128,3 +128,31 @@ MYSQL_MAX_CONNECTIONS=100
 #   by creating additional worker processes to consume messages
 # Default: 0
 # ADDITIONAL_MEDIA_SYNC_WORKER_COUNT=0
+
+#
+# PHP-SPX profiling extension Configuration
+#
+# These environment variables allow you to enable and configure the PHP-SPX profiling extension
+# which can be helpful when debugging resource issues in AzuraCast.
+#
+# The profiling dashboard can be accessed by visting https://yourdomain.com/?SPX_KEY=dev&SPX_UI_URI=/
+# If you change the PROFILING_EXTENSION_HTTP_KEY variable change the value for SPX_KEY accordingly.
+#
+
+# Enable the profiling extension.
+# Profiling data can be viewed by visiting http://your-azuracast-site/?SPX_KEY=dev&SPX_UI_URI=/
+# Default: 0
+PROFILING_EXTENSION_ENABLED=1
+
+# Profile ALL requests made to this account.
+# This will have significant performance impact on your installation and should only be used in test circumstances.
+# Default: 0
+PROFILING_EXTENSION_ALWAYS_ON=0
+
+# Configure the value for the SPX_KEY parameter needed to access the profiling dashboard
+# Default: dev
+# PROFILING_EXTENSION_HTTP_KEY=dev
+
+# Configure the IP whitelist for the profiling dashboard
+# Default: *
+# PROFILING_EXTENSION_HTTP_IP_WHITELIST=*
diff --git a/docker-compose.testing.yml b/docker-compose.testing.yml
index 8a8937b22..89b7672de 100644
--- a/docker-compose.testing.yml
+++ b/docker-compose.testing.yml
@@ -2,12 +2,7 @@ version : '2.2'
 
 services :
   web :
-    image : azuracast_cli:latest
     environment :
       APPLICATION_ENV : 'testing'
-    build :
-      context : ./util/docker/testing
-      cache_from :
-        - azuracast/azuracast_web_v2:latest
     volumes :
       - .:/var/azuracast/www
diff --git a/util/docker/testing/Dockerfile b/util/docker/testing/Dockerfile
deleted file mode 100644
index 41f34c4cc..000000000
--- a/util/docker/testing/Dockerfile
+++ /dev/null
@@ -1,9 +0,0 @@
-FROM azuracast/azuracast_web_v2:latest
-
-RUN apt-get update \
-    && apt-get install -q -y php7.4-xdebug
-
-ENV PATH="${PATH}:/var/azuracast/.composer/vendor/bin" \
-    APPLICATION_ENV="testing"
-
-USER root
diff --git a/util/docker/web/php/php.ini.tmpl b/util/docker/web/php/php.ini.tmpl
index cf1336903..292e8dff3 100644
--- a/util/docker/web/php/php.ini.tmpl
+++ b/util/docker/web/php/php.ini.tmpl
@@ -12,4 +12,16 @@ opcache.enable_cli=1
 
 {{if eq .Env.APPLICATION_ENV "production"}}
 opcache.revalidate_freq={{ default .Env.PHP_OPCACHE_REVALIDATE_FREQUENCY "60" }}
-{{end}}
\ No newline at end of file
+{{end}}
+
+{{if eq .Env.PROFILING_EXTENSION_ENABLED "1"}}
+spx.http_enabled=1
+spx.data_dir=/var/azuracast/www_tmp
+spx.http_key={{ default .Env.PROFILING_EXTENSION_HTTP_KEY "dev" }}
+spx.http_ip_whitelist={{ default .Env.PROFILING_EXTENSION_HTTP_IP_WHITELIST "*" }}
+zlib.output_compression=0
+
+{{if eq .Env.PROFILING_EXTENSION_ALWAYS_ON "1"}}
+spx.http_profiling_enabled=1
+{{end}}
+{{end}}
diff --git a/util/docker/web/php/www.conf.tmpl b/util/docker/web/php/www.conf.tmpl
index 78d2eaf3a..0ba470797 100644
--- a/util/docker/web/php/www.conf.tmpl
+++ b/util/docker/web/php/www.conf.tmpl
@@ -21,4 +21,8 @@ chdir = /
 
 clear_env=No
 catch_workers_output = yes
-decorate_workers_output = no
\ No newline at end of file
+decorate_workers_output = no
+
+{{if eq .Env.PROFILING_EXTENSION_ENABLED "1"}}
+process.dumpable = yes
+{{end}}
diff --git a/util/docker/web/setup/php.sh b/util/docker/web/setup/php.sh
index 5083863e7..664ae2423 100644
--- a/util/docker/web/setup/php.sh
+++ b/util/docker/web/setup/php.sh
@@ -9,7 +9,7 @@ apt-get update
 $minimal_apt_get_install php7.4-fpm php7.4-cli php7.4-gd \
     php7.4-curl php7.4-xml php7.4-zip php7.4-bcmath php7.4-gmp \
     php7.4-mysqlnd php7.4-mbstring php7.4-intl php7.4-redis \
-    php7.4-maxminddb \
+    php7.4-maxminddb php7.4-xdebug \
     mariadb-client
 
 # Copy PHP configuration
@@ -21,3 +21,19 @@ cp /bd_build/php/www.conf.tmpl /etc/php/7.4/fpm/www.conf.tmpl
 
 # Install Composer
 curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/bin --filename=composer
+
+# Install PHP SPX profiler
+$minimal_apt_get_install php7.4-dev zlib1g-dev build-essential
+
+cd /bd_build
+git clone https://github.com/NoiseByNorthwest/php-spx.git
+cd php-spx
+phpize
+./configure
+make
+sudo make install
+
+apt-get remove --purge -y php7.4-dev zlib1g-dev build-essential
+
+echo "extension=spx.so" > /etc/php/7.4/cli/conf.d/30-spx.ini
+echo "extension=spx.so" > /etc/php/7.4/fpm/conf.d/30-spx.ini