diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index fcf2d6d..1dbea39 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,7 +9,7 @@ on:
 
 jobs:
   tests:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     services:
       redis:
         image: redis:3.2-alpine
@@ -60,7 +60,7 @@ jobs:
           run: composer test
 
   static-analysis:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     name: "Static analysis"
     strategy:
       fail-fast: false
@@ -80,7 +80,7 @@ jobs:
           coverage: "none"
 
       - name: "Cache dependencies installed with composer"
-        uses: "actions/cache@v2"
+        uses: "actions/cache@v4"
         with:
           path: "~/.composer/cache"
           key: "php-${{ matrix.php-version }}-composer-locked-${{ hashFiles('composer.lock') }}"
diff --git a/Stopwatch/Stopwatch.php b/Stopwatch/Stopwatch.php
index d98ca4b..1f7e3f4 100644
--- a/Stopwatch/Stopwatch.php
+++ b/Stopwatch/Stopwatch.php
@@ -4,6 +4,8 @@
 
 class Stopwatch
 {
+    private const FLUSH_TIMERS_LIMIT = 1000;
+
     protected $enabled = false;
     protected $initTags = [];
 
@@ -29,7 +31,9 @@ function_exists('pinba_timer_start')
             && function_exists('pinba_timer_stop')
             && function_exists('pinba_timer_add')
             && function_exists('pinba_get_info')
-            ;
+            && function_exists('pinba_timers_get')
+            && function_exists('pinba_flush')
+        ;
     }
 
     public function disable(): void
@@ -37,17 +41,21 @@ public function disable(): void
         $this->enabled = false;
     }
 
-    public function start(array $tags)
+    public function start(array $tags): StopwatchEvent
     {
-        if ($this->enabled) {
-            $tags = array_merge($this->initTags, $tags);
-            if (isset($tags['group']) && !isset($tags['category']) && false !== strpos($tags['group'], '::')) {
-                $v = explode('::', $tags['group']);
-                $tags['category'] = $v[0];
-            }
+        if (!$this->enabled) {
+            return new StopwatchEvent();
+        }
+
+        $this->flushIfTimersLimitReached();
+
+        $tags = array_merge($this->initTags, $tags);
+        if (isset($tags['group']) && !isset($tags['category']) && false !== strpos($tags['group'], '::')) {
+            $v = explode('::', $tags['group']);
+            $tags['category'] = $v[0];
         }
 
-        return new StopwatchEvent($this->enabled ? pinba_timer_start($tags) : null);
+        return new StopwatchEvent(pinba_timer_start($tags));
     }
 
     public function add(array $tags, $time): void
@@ -56,8 +64,17 @@ public function add(array $tags, $time): void
             return;
         }
 
-        $tags = array_merge($this->initTags, $tags);
+        $this->flushIfTimersLimitReached();
 
+        $tags = array_merge($this->initTags, $tags);
         pinba_timer_add($tags, $time);
     }
+
+    private function flushIfTimersLimitReached(): void
+    {
+        $timersCount = count(pinba_timers_get(PINBA_ONLY_STOPPED_TIMERS));
+        if ($timersCount >= self::FLUSH_TIMERS_LIMIT) {
+            pinba_flush(null, PINBA_FLUSH_ONLY_STOPPED_TIMERS);
+        }
+    }
 }
diff --git a/meta/phpstan/stub.php b/meta/phpstan/stub.php
index 1d7bc38..2f31349 100644
--- a/meta/phpstan/stub.php
+++ b/meta/phpstan/stub.php
@@ -24,3 +24,24 @@ function pinba_timer_add(array $tags, int $value)
     {
     }
 }
+
+if (!function_exists('pinba_timers_get')) {
+    function pinba_timers_get(int $flag = 0): array
+    {
+        return [];
+    }
+}
+
+if (!function_exists('pinba_flush')) {
+    function pinba_flush(?string $scriptName = null, int $flags = 0): void
+    {
+    }
+}
+
+if (!defined('PINBA_ONLY_STOPPED_TIMERS')) {
+    define('PINBA_ONLY_STOPPED_TIMERS', 1);
+}
+
+if (!defined('PINBA_FLUSH_ONLY_STOPPED_TIMERS')) {
+    define('PINBA_FLUSH_ONLY_STOPPED_TIMERS', 1);
+}