Hi. Unless you provide a standalone test program it will very difficult for anyone to assist you. 

On Apr 29, 2025, at 5:03 AM, christoph...@gmail.com <christophe.mees...@gmail.com> wrote:


More strange result.

With Firefox, the time measured with time.Since is 55μs on average, and with Chromium it’s on average 200μs but with a big jitter. It’s not the OS (Ubuntu 2.24LTS) load that changes as both browsers are running side by side. How can the ServeHttp processing time change (~ x4) depending on the browser ? 



Le lundi 28 avril 2025 à 18:28:25 UTC+2, christoph...@gmail.com a écrit :
I have created web site with a middleware measuring the execution time of requests using the time.Since(start) method. It is thus using the wall time.

I see that the execution of the ServeHttp() is around 60μs. The handler is a function that simply renders the login page that I benchmarked to use at most 1μs.

The time difference seams huge. The server is idle and receiving only one request at the time. I know that measuring execution time with a wall clock on a time sharing system is not a great, but I have 8 cores and they are mostly idle. I apparently don’t have a better method.

I also saw a big jitter which was reduced by adding the instructions

runtime.LockOsThread()
defer runtime.UnlockOsThread()
runtime.GOMAXPROCS(1)

But I still see the big execution duration.

Unfortunately, I can’t benchmark the ServeHttp() method has the object is complex (db, etc.).

Is there a more precise way to measure the execution time Such big values don’t seam very accurate.

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