I am experiencing unexpected latency issues with Redis in my Laravel application. Here are the details:

Setup:

Redis Client: I am using the phpredis extension.
Environment: Redis is running on Windows Subsystem for Linux (WSL).

Issue:
When I measure the time for the first Redis connection, it takes around 27.18 milliseconds.
Subsequent connection times are significantly lower, around 0.19 milliseconds, which seems normal.
However, when I run the same code to measure latency multiple times within the same second, I observe that the timing for each request remains consistently high, even though the connection should already be established.

Additional Context:
Redis Insight shows a process time of 8.629 milliseconds, which is lower than the latency observed in my application.

this my code :

Route::get('redis/{website}', function ($website) {
    $firstconnectionStart = microtime(true);
    $website_id = Redis::hget("websites", $website);
    $firstconnectionEnd = microtime(true);

    if (empty($website_id)) {
        $website_id = DB::select("SELECT `id` FROM `websites` where `domain` = '$website' ")[0]->id;
        Redis::hset("websites", $website, $website_id);
    }

    //categoriesTree handling
    $start = microtime(true);
    $categoriestree = Redis::hget("categoriestree", $website_id);
    $end = microtime(true);
    if (empty($categoriestree)) {
        $categories = Category::where("website_id", $website_id)->get();
        $categoriestree = CategoryTree::tree(categories: $categories);
        $serializedModel = serialize($categoriestree);
        Redis::hset("categoriestree", $website_id, $serializedModel);
    } else {
        $categoriestree = unserialize($categoriestree);
    }
    $time1 = ($firstconnectionEnd - $firstconnectionStart) * 1000;
    $time2 = ($end - $start) * 1000;

    echo "first connction time  : $time1 <br>";
    echo "second connction time : $time2";
    dd($categoriestree);
});

and this the output output

i tried to erified Redis configuration and checked for persistence settings and
Monitored system performance and resource usage.