cURL或wget来测量页面加载时间？

brjng4g3  于 2022-11-13  发布在  其他
关注(0)|答案(2)|浏览(197)

什么是最好/最准确的方法来衡量页面加载时间，包括加载所有页面资源的时间？（基本上是试图获得一个真实的的最终用户可能拥有的加载时间）。
对于此类任务，使用Wget或cURL更好吗？（由于其他依赖关系，使用的操作系统将是Windows）

curl

2条答案

按热度按时间
mhd8tkvw

mhd8tkvw1#

您可以使用-p选项下载wget页面请求的所有资源：

wget -p https://www.example.com/

curl不会解析HTML，因此不能用于此目的。它只会打印初始页面的HTML，但如果HTML请求图像或CSS或JS文件，它不会知道（因为它不会解析HTML），因此不会下载任何文件。
如果页面通过JavaScript请求资源，则wget不是页面加载时间的非常准确的度量，因为wget不会解析或执行JavaScript。获取用户感知的加载时间的更准确方法是在Chrome中打开页面，然后查看所用时间。您可以查看开发工具中的“网络”选项卡来查看准确的细分。如果您“如果你想让它自动化，你可以通过“ Puppeteer ”来使用Chrome Headless，比如：

const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.launch();
  // Get the first tab
  const page = (await browser.pages())[0];

  await page.goto('https://example.com/');
  const loadTime = page.evaluate(() => window.performance.timing.loadEventEnd - window.performance.timing.navigationStart);
  console.log(loadTime);

  await browser.close();
})();

由于浏览器对DNS结果、TLS握手或资源的缓存，这本身也是不准确的。

赞(0）分享  回复(0）举报  2022-11-13
holgip5t

holgip5t2#

更新

如果只获得页面加载时间，则无法完成所需的操作。至少需要 “Time to First Byte” 来消除性能问题导致的服务器延迟。
WebPageTest有很多数据，但我使用的数据很少。下面的例子中，JSON文件有162，260行JSON（5.5 MB），我使用了其中的125行（4 KB）。
为了向您展示它是多么容易，我在几个小时内编写了这个PHP应用程序。
我在https://www.webpagetest.org输入了一个URL
我复制了“下载JSON”链接
把它粘贴到我的PHP代码中
代码、
已检索JSON
得到了我需要的JSON的子字符串。
然后格式化数据
又做了一张table
我只是使用了一些评估性能所需的参数。
我包括了DOM元素的数量和JS & CSS阻塞，因为这些都是许多页面，特别是WordPress页面的常见问题。
我发现布局偏移很重要。布局偏移是在第一次绘制之后，JS做出了一个需要浏览器进行另一次渲染的更改。

<?php
header("Content-Type: text/html; UTF-8");

$data = file_get_contents('https://www.webpagetest.org/jsonResult.php?test=<result id>&pretty=1');
$start = strpos($data,'chromeUserTiming.CumulativeLayoutShift": ') + 41;

$LayoutShift = substr($data,$start,6);
$start = strpos($data,'"firstView": {') + 13;

$end = strpos($data,'}',$start) + 1;
$json = substr($data,$start,$end - $start);
unset($data);
$json = json_decode($json,1);
$TTFB = number_format($json['TTFB'] / 1000,3); 
$loadTime = number_format($json['loadTime'] / 1000,3);
$fullyLoaded = number_format($json['fullyLoaded'] / 1000,3);
$loadEventStart = number_format($json['loadEventStart'] / 1000,3);
$firstPaint = number_format($json['firstPaint'] / 1000,3);
$firstContentfulPaint = number_format($json['firstContentfulPaint'] / 1000,3);
$renderBlockingCSS = number_format($json['renderBlockingCSS'] / 1000,3);
$renderBlockingJS = number_format($json['renderBlockingJS'] / 1000,3);
$TotalBlockingTime = number_format($json['TotalBlockingTime'] / 1000,3);
$FirstInteractive = number_format($json['FirstInteractive'] / 1000,3);
$fullyLoaded = number_format($json['fullyLoaded'] / 1000,3);
$TotalBlockingTime = number_format($json['TotalBlockingTime'] / 1000,3);
$renderBlockingCSS = number_format($json['renderBlockingCSS'] / 1000,3);
$renderBlockingJS = number_format($json['renderBlockingJS'] / 1000,3);
$requests = $json['requests'] ;
$domElements = $json['domElements'] ;
$domComplete = number_format($json['domComplete'] / 1000,3);
$LayoutShift = number_format($json['chromeUserTiming.TotalLayoutShift'] / 1000,3);
echo <<<EOT
<table>
<tr><td>First Byte</td><td>$TTFB</td></tr>
<tr><td>DOM Complete</td><td>$domComplete</td></tr>
<tr><td>Load Time</td><td>$loadTime</td></tr>
<tr><td>First Paint</td><td>$firstPaint </td></tr>
<tr><td>Fully Loaded</td><td>$fullyLoaded</td></tr>
<tr><td></td> <td></td> </tr>
<tr><td></td> <td></td> </tr>
<tr><td>Requests</td><td>$requests</td></tr>
<tr><td>DOM Elements</td><td>$domElements</td></tr>
<tr><td>CSS Render Blocking</td><td>$renderBlockingCSS</td></tr>
<tr><td>JS Render Blocking</td><td>$renderBlockingJS</td></tr>
<tr><td>Total Blocking Time</td><td>$TotalBlockingTime </td></tr>
<tr><td>Layout Shift</td><td>$LayoutShift </td></tr>
</table
EOT;
?>

结果

这些结果适用于包含大量图片的移动的页面。
对于移动的，我喜欢尽可能少的请求。
我在页面中嵌入了base64格式的图像。

这是我实际使用的JSON的子字符串：

{
"loadTime": 580.33333333333337,
"docTime": 580.33333333333337,
"fullyLoaded": 640.33333333333337,
"bytesOut": 3480,
"bytesOutDoc": 3114.6666666666665,
"bytesIn": 117909,
"bytesInDoc": 117862.66666666667,
"requests": 3,
"requestsFull": 3,
"requestsDoc": 2.6666666666666665,
"responses_200": 3,
"responses_404": 0,
"responses_other": 0,
"result": 0,
"testStartOffset": 0,
"cached": 0,
"optimization_checked": 1,
"loadEventStart": 575.33333333333337,
"loadEventEnd": 575.66666666666663,
"domContentLoadedEventStart": 510.33333333333331,
"domContentLoadedEventEnd": 510.33333333333331,
"connections": 1,
"final_base_page_request": 0,
"firstPaint": 304.63333333283333,
"firstContentfulPaint": 309.66666666666669,
"firstImagePaint": 309.66666666666669,
"firstMeaningfulPaint": 309.66666666666669,
"domInteractive": 510.33333333333331,
"renderBlockingCSS": 0,
"renderBlockingJS": 0,
"TTFB": 264.66666666666669,
"score_cache": 0,
"score_cdn": 0,
"score_gzip": 100,
"score_cookies": -1,
"score_keep-alive": 100,
"score_minify": -1,
"score_combine": -1,
"score_compress": 100,
"score_etags": -1,
"score_progressive_jpeg": -1,
"gzip_total": 118336,
"gzip_savings": 0,
"minify_total": -1,
"minify_savings": -1,
"image_total": 1667,
"image_savings": 0,
"cpu.PrePaint": 1,
"cpu.Paint": 2.6666666666666665,
"cpu.FireAnimationFrame": 0,
"cpu.FunctionCall": 5.333333333333333,
"cpu.EventDispatch": 0.66666666666666663,
"cpu.CommitLoad": 0,
"cpu.EvaluateScript": 1.3333333333333333,
"cpu.v8.compile": 0.33333333333333331,
"cpu.ParseHTML": 7,
"cpu.ResourceFetcher::requestResource": 8.3333333333333339,
"cpu.UpdateLayoutTree": 9.6666666666666661,
"cpu.Layout": 17.333333333333332,
"cpu.largestContentfulPaint::Candidate": 0,
"cpu.HitTest": 0,
"cpu.MarkDOMContent": 0,
"cpu.MarkLoad": 0,
"cpu.Idle": 586.33333333333337,
"start_epoch": 1666370740.1789024,
"date": 1666370741.9859715,
"fullyLoadedCPUms": 670,
"fullyLoadedCPUpct": 9.1036962354000011,
"domElements": 75,
"domComplete": 575.33333333333337,
"PerformancePaintTiming.first-paint": 304.63333333283333,
"PerformancePaintTiming.first-contentful-paint": 304.63333333283333,
"test_run_time_ms": 5673.333333333333,
"Colordepth": 24,
"generated-content-percent": -0.029999999999999999,
"generated-content-size": -0.040000000000000001,
"lastVisualChange": 400,
"render": 300,
"visualComplete85": 300,
"visualComplete90": 300,
"visualComplete95": 300,
"visualComplete99": 400,
"visualComplete": 400,
"SpeedIndex": 303,
"chromeUserTiming.navigationStart": 5.333333333333333,
"chromeUserTiming.fetchStart": 8.3333333333333339,
"chromeUserTiming.unloadEventStart": 275.66666666666669,
"chromeUserTiming.unloadEventEnd": 275.66666666666669,
"chromeUserTiming.commitNavigationEnd": 276,
"chromeUserTiming.domLoading": 276.33333333333331,
"chromeUserTiming.firstPaint": 309,
"chromeUserTiming.firstContentfulPaint": 309,
"chromeUserTiming.firstImagePaint": 309.33333333333331,
"chromeUserTiming.firstMeaningfulPaintCandidate": 309.33333333333331,
"chromeUserTiming.firstMeaningfulPaint": 309.33333333333331,
"chromeUserTiming.responseEnd": 510.33333333333331,
"chromeUserTiming.domInteractive": 515.66666666666663,
"chromeUserTiming.domContentLoadedEventStart": 515.66666666666663,
"chromeUserTiming.domContentLoadedEventEnd": 515.66666666666663,
"chromeUserTiming.domComplete": 580,
"chromeUserTiming.loadEventStart": 580.33333333333337,
"chromeUserTiming.loadEventEnd": 580.66666666666663,
"chromeUserTiming.LargestTextPaint": 309.66666666666669,
"chromeUserTiming.LargestImagePaint": 309.66666666666669,
"chromeUserTiming.LargestContentfulPaint": 309.66666666666669,
"chromeUserTiming.TotalLayoutShift": 0.0011286408333333333,
"chromeUserTiming.CumulativeLayoutShift": 0.0011286408333333333,
"TTIMeasurementEnd": 3657.3333333333335,
"LastInteractive": 300,
"run": 2,
"step": 1,
"effectiveBps": 313879.33333333331,
"domTime": 0,
"aft": 0,
"titleTime": 293.33333333333331,
"domLoading": 0,
"server_rtt": 0,
"maxFID": 0,
"TotalBlockingTime": 0,
"effectiveBpsDoc": 373405.33333333331,
"chromeUserTiming.LayoutShift": 109,
"avgRun": 3
}

我也使用GT Metrix

和PageSpeed见解

以及W3C验证器，包括HTML和CSS


指令集

更新结束

你可以使用curl来获得HTML的响应时间，它不会给予你更多的信息。
curl将为您提供：

CURLINFO_SIZE_UPLOAD - Total number of bytes uploaded
CURLINFO_SIZE_DOWNLOAD - Total number of bytes downloaded
CURLINFO_SPEED_DOWNLOAD - Average download speed
CURLINFO_SPEED_UPLOAD - Average upload speed

据我所知，获取HTTP请求的所有详细信息的最好方法是使用https://www.webpagetest.org
你可以使用他们的API来获得300性能测试结果每月免费.
LINK to webpagetest.org API

示例您 curl API，它将返回指向详细信息的链接。在这些链接中，有大量的信息和图像。

然后 curl 所需的链接。
LINK to HAR details of loading this page. 110,000 lines of info in 6,795,929 bytes

curl https://www.webpagetest.org/runtest.php?url=https://www.webpagetest.org&k={YOUR_API_KEY}&f=json

{
   "statusCode": 200,
   "statusText": "Ok",
      "data": {
         "testId": "210328_XiVQ_b694021b2a24ca1912dae50fb58b5861",
         "jsonUrl": "https://www.webpagetest.org/jsonResult.php?test=210328_XiVQ_b694021b2a24ca1912dae50fb58b5861",
         "xmlUrl": "https://www.webpagetest.org/xmlResult/210328_XiVQ_b694021b2a24ca1912dae50fb58b5861/",
         "userUrl": "https://www.webpagetest.org/result/210328_XiVQ_b694021b2a24ca1912dae50fb58b5861/",
         "summaryCSV": "https://www.webpagetest.org/result/210328_XiVQ_b694021b2a24ca1912dae50fb58b5861/page_data.csv",
         "detailCSV": "https://www.webpagetest.org/result/210328_XiVQ_b694021b2a24ca1912dae50fb58b5861/requests.csv"
      }
}

下面的瀑布图显示了您可以获得的一些详细信息。
您可以获得各种格式的详细信息：

  • JSON格式
  • CSV格式
  • 可扩展标记语言
  • 危险

CSV信息示例

"type","id","request_id","ip_addr","full_url","is_secure","method","host","url","raw_id","frame_id","documentURL","responseCode","request_type","load_ms","ttfb_ms","load_start","load_start_float","bytesIn","objectSize","objectSizeUncompressed","expires","cacheControl","contentType","contentEncoding","socket","protocol","dns_start","dns_end","connect_start","connect_end","ssl_start","ssl_end","initiator","initiator_line","initiator_column","initiator_type","priority","initial_priority","server_rtt","bytesOut","score_cache","score_cdn","score_gzip","score_cookies","score_keep-alive","score_minify","score_combine","score_compress","score_etags","dns_ms","connect_ms","ssl_ms","gzip_total","gzip_save","minify_total","minify_save","image_total","image_save","cache_time","cdn_provider","server_count","created","http2_stream_id","http2_stream_dependency","http2_stream_weight","http2_stream_exclusive","tls_version","tls_resumed","tls_next_proto","tls_cipher_suite","netlog_id","server_port","final_base_page","is_base_page","load_end","ttfb_start","ttfb_end","download_start","download_end","download_ms","all_start","all_end","all_ms","index","number","cpu.EvaluateScript","cpu.v8.compile","cpu.FunctionCall","cpuTime","run","cached","renderBlocking","initiator_function",
"3","221020_AiDc05_4BQ","BE8FE33DABBBA0CF2B3AC5D78083C66E","151.101.193.69","https://stackoverflow.com/questions/74122109/curl-or-wget-for-measuring-page-load-time","1","GET","stackoverflow.com","/questions/74122109/curl-or-wget-for-measuring-page-load-time","BE8FE33DABBBA0CF2B3AC5D78083C66E","4476133D5C5FF9920B0E2BB49084B133","https://stackoverflow.com/questions/74122109/curl-or-wget-for-measuring-page-load-time","200","Document","346","198","533","533.000041","40562","40562","145896","","private","text/html","gzip","50","HTTP/2","0","172","173","344","344","533","","","","script","Highest","Highest","","2317","-1","100","100","-1","100","-1","-1","-1","-1","-1","171","189","41099","0","","","","","","Fastly","","4","1","0","256","1","TLS 1.2","False","h2","49199","41","443","1","1","879","533","731","731","879","148","173","879","706","0","1","135","26","2","164","1","0","","",
"3","221020_AiDc05_4BQ","6487.6","151.101.193.69","https://cdn.sstatic.net/Js/stub.en.js?v=0e3ada576039","1","GET","cdn.sstatic.net","/Js/stub.en.js?v=0e3ada576039","6487.6","4476133D5C5FF9920B0E2BB49084B133","https://stackoverflow.com/questions/74122109/curl-or-wget-for-measuring-page-load-time","200","Script","585","568","967","967.000067","18152","18152","53336","","max-age=604800","application/javascript","gzip","50","HTTP/2","787","967","-1","-1","-1","-1","https://stackoverflow.com/questions/74122109/curl-or-wget-for-measuring-page-load-time","25","","parser","High","High","","1831","50","100","100","-1","100","-1","-1","-1","-1","180","-1","-1","18152","0","","","","","34541","Fastly","","788","9","","","","","","","","67","","","","1552","967","1535","1535","1552","17","787","1552","765","1","2","34","8","443","485","1","0","blocking","",
"3","221020_AiDc05_4BQ","6487.5","151.101.193.69","https://cdn.sstatic.net/Js/third-party/npm/@stackoverflow/stacks/dist/js/stacks.min.js?v=facbc6b2f3b6","1","GET","cdn.sstatic.net","/Js/third-party/npm/@stackoverflow/stacks/dist/js/stacks.min.js?v=facbc6b2f3b6","6487.5","4476133D5C5FF9920B0E2BB49084B133","https://stackoverflow.com/questions/74122109/curl-or-wget-for-measuring-page-load-time","200","Script","599","568","968","968.000061","23746","23746","100193","","max-age=604800","application/javascript","gzip","50","HTTP/2","-1","-1","-1","-1","-1","-1","https://stackoverflow.com/questions/74122109/curl-or-wget-for-measuring-page-load-time","24","","parser","Low","Low","","1978","50","100","100","-1","100","-1","-1","-1","-1","-1","-1","-1","23746","0","","","","","567498","Fastly","","786","11","","","","","","","","61","","","","1567","968","1536","1536","1567","31","968","1567","599","2","3","81","2","38","121","1","0","potentially_blocking","",
"3","221020_AiDc05_4BQ","6487.7","151.101.193.69","https://cdn.sstatic.net/Shared/stacks.css?v=5ad0f45f4799","1","GET","cdn.sstatic.net","/Shared/stacks.css?v=5ad0f45f4799","6487.7","4476133D5C5FF9920B0E2BB49084B133","https://stackoverflow.com/questions/74122109/curl-or-wget-for-measuring-page-load-time","200","Stylesheet","363","188","968","968.000072","68692","68692","654577","","max-age=604800","text/css","gzip","50","HTTP/2","-1","-1","-1","-1","-1","-1","https://stackoverflow.com/questions/74122109/curl-or-wget-for-measuring-page-load-time","28","","parser","Highest","Highest","","1885","50","100","100","-1","100","-1","-1","-1","-1","-1","-1","-1","68692","0","","","","","542107","Fastly","","790","3","","","","","","","","72","","","","1331","968","1156","1156","1331","175","968","1331","363","3","4","","","","","1","0","blocking","",
"3","221020_AiDc05_4BQ","6487.8","151.101.193.69","https://cdn.sstatic.net/Sites/stackoverflow/primary.css?v=0cc30ee01b86","1","GET","cdn.sstatic.net","/Sites/stackoverflow/primary.css?v=0cc30ee01b86","6487.8","4476133D5C5FF9920B0E2BB49084B133","https://stackoverflow.com/questions/74122109/curl-or-wget-for-measuring-page-load-time","200","Stylesheet","550","374","968","968.000077","60467","60467","339815","","max-age=604800","text/css","gzip","50","HTTP/2","-1","-1","-1","-1","-1","-1","https://stackoverflow.com/questions/74122109/curl-or-wget-for-measuring-page-load-time","29","","parser","Highest","Highest","","1927","50","100","100","-1","100","-1","-1","-1","-1","-1","-1","-1","60467","0","","","","","134559","Fastly","","793","5","","","","","","","","77","","","","1518","968","1342","1342","1518","176","968","1518","550","4","5","","","","","1","0","blocking","",
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"3","221020_AiDc05_4BQ","6487.4","142.251.163.95","https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js","1","GET","ajax.googleapis.com","/ajax/libs/jquery/1.12.4/jquery.min.js","6487.4","4476133D5C5FF9920B0E2BB49084B133","https://stackoverflow.com/questions/74122109/curl-or-wget-for-measuring-page-load-time","200","Script","370","175","1309","1309.000055","33951","33951","97163","Thu, 19 Oct 2023 17:18:45 GMT","public, max-age=31536000, stale-while-revalidate=2592000","text/javascript","gzip","87","HTTP/2","784","955","955","1128","1128","1309","https://stackoverflow.com/questions/74122109/curl-or-wget-for-measuring-page-load-time","23","","parser","High","High","","1870","100","100","100","-1","100","-1","-1","-1","-1","171","173","181","33951","0","","","","","31493759","Google","","783","1","0","220","1","TLS 1.3","False","h2","4865","55","443","","","1679","1309","1484","1484","1679","195","784","1679","895","6","7","64","12","31","107","1","0","blocking","",
"3","221020_AiDc05_4BQ","6487.10","151.101.193.69","https://cdn.sstatic.net/Img/teams/teams-illo-free-sidebar-promo.svg?v=47faa659a05e","1","GET","cdn.sstatic.net","/Img/teams/teams-illo-free-sidebar-promo.svg?v=47faa659a05e","6487.10","4476133D5C5FF9920B0E2BB49084B133","https://stackoverflow.com/questions/74122109/curl-or-wget-for-measuring-page-load-time","200","Image","176","175","1580","1580.000099","2368","2368","5950","","max-age=604800","image/svg+xml","gzip","50","HTTP/2","-1","-1","-1","-1","-1","-1","https://stackoverflow.com/questions/74122109/curl-or-wget-for-measuring-page-load-time","485","","parser","Low","Low","","2101","50","100","100","-1","100","-1","-1","-1","-1","-1","-1","-1","2368","0","","","","","93767","Fastly","","1579","13","0","147","1","","","","","99","443","","","1756","1580","1755","1755","1756","1","1580","1756","176","7","8","","","","","1","0","","",
"3","221020_AiDc05_4BQ","6487.20","151.101.193.69","https://cdn.sstatic.net/Img/unified/sprites.svg?v=fcc0ea44ba27","1","GET","cdn.sstatic.net","/Img/unified/sprites.svg?v=fcc0ea44ba27","6487.20","4476133D5C5FF9920B0E2BB49084B133","https://stackoverflow.com/questions/74122109/curl-or-wget-for-measuring-page-load-time","200","Image","176","174","2163","2163.000126","2852","2852","7542","","max-age=604800","image/svg+xml","gzip","50","HTTP/2","-1","-1","-1","-1","-1","-1","https://cdn.sstatic.net/Sites/stackoverflow/primary.css?v=0cc30ee01b86","","","parser","High","Low","","2173","50","100","100","-1","100","-1","-1","-1","-1","-1","-1","-1","2852","0","","","","","383944","Fastly","","2162","15","0","147","1","","","","","126","443","","","2339","2163","2337","2337","2339","2","2163","2339","176","8","9","","","","","1","0","","",

CSV包含有关呈现页面的每个请求的以下详细信息。

type
id
request_id
ip_addr
full_url
is_secure
method
host
url
raw_id
frame_id
documentURL
responseCode
request_type
load_ms
ttfb_ms
load_start
load_start_float
bytesIn
objectSize
objectSizeUncompressed
expires
cacheControl
contentType
contentEncoding
socket
protocol
dns_start
dns_end
connect_start
connect_end
ssl_start
ssl_end
initiator
initiator_line
initiator_column
initiator_type
priority
initial_priority
server_rtt
bytesOut
score_cache
score_cdn
score_gzip
score_cookies
score_keep-alive
score_minify
score_combine
score_compress
score_etags
dns_ms
connect_ms
ssl_ms
gzip_total
gzip_save
minify_total
minify_save
image_total
image_save
cache_time
cdn_provider
server_count
created
http2_stream_id
http2_stream_dependency
http2_stream_weight
http2_stream_exclusive
tls_version
tls_resumed
tls_next_proto
tls_cipher_suite
netlog_id
server_port
final_base_page
is_base_page
load_end
ttfb_start
ttfb_end
download_start
download_end
download_ms
all_start
all_end
all_ms
index
number
cpu.EvaluateScript
cpu.v8.compile
cpu.FunctionCall
cpuTime
run
cached
renderBlocking
initiator_function
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