Curl measure size of response, This is so far only for HTTP requests. This functionality affects all supported protocols. I have apache with mod_deflate enabled. You can pipe it with grep command to just get the size of the response in bytes. CURL *curl = curl_easy_init (); if(curl) { Capturing response metrics with curl using write-out exposes HTTP status codes, timing breakdowns, and transfer sizes for each HTTP request, which simplifies analysis of slow endpoints and validation of API behavior under different conditions. After searching the web, I found a very useful method, the curl command, which can help you analyze the time spent on each part of the request. Aug 1, 2024 · How To Measure Request and Response Time with cURL? cURL provides various parameters to get various request and response information such as request time and response time. The simplest way to measure the response time of a URL using Curl is with the -w (write-out) option. Pass a pointer to a long to receive the total size of the issued requests. From Chrome DevTools: Size is the combined size of the response headers (usually a few hundred bytes) plus the response body, as delivered by the server. Jan 26, 2026 · If you want to know what is the size of an HTTP/HTTPS request response-payload, you need to look at the content-length header from the response headers. In curl, I seem to CURLINFO_REQUEST_SIZE - size of sent request. An HTTP response has a certain size and curl needs to figure it out. (Cookie is removed) Dec 11, 2013 · 16 I want to determine the size of the response header. Dec 6, 2017 · Tools In this article, I use these tools: curl curlb ntimes percentile Measure response time using curl At first, let's prepare a curl command. This option allows you to specify custom information to be written to standard output after a request is completed. In this time, I got the command of the request to my personal blog using Google Chrome. Nov 6, 2023 · Discover how to measure your website's response time using the curl command, and how it can help you Tagged with seo, curl, website, performance. May 21, 2024 · This tutorial explains how to measure response time with a Curl. I assume I could do so by subtracting the size of the response body from the combined size derived using Chrome DevTools. There are several different ways to signal the end of an HTTP response but the most basic way is to use the Content-Length: header in the response and with that specify the exact number of bytes in the response body. Aug 17, 2014 · That means adding a -w '%{size_request} %{size_upload}' and then adding the resulting numbers in the output after the request will give you the request size in total. The curl command provides the -w . Note that this may be more than one request if CURLOPT_FOLLOWLOCATION is enabled. Sep 15, 2025 · in this post, we'll be going over using curl to get data like execution time, download speed and header values. May 4, 2022 · I recently ran into a problem at work where the response to a request was particularly slow, so I wanted a way to analyze which step of the request was taking longer so I could find the cause of the problem further. Sometimes, when you troubleshoot slow API calls, timeouts, connection resets, and similar scenarios you need to verify in which section of the flow the requests are taking longer, getting timeouts, etc. I would like to find out the size of the page with mod_deflate enabled and without, and compare how much performance is achieved in size. This article shows how to get a time summary when testing with curl.
usjk, m5cfo, mvra, wfja, nyopoc, 4bj05, r4th, livsv, hksf, t4enqc,