Caching Score: https://mainstagerehearsal.com/
Summary
GradeD
138/320
Requested URL checks
What is this check, and why should you care
Using Last-Modified headers is an easy way to ensure your visitors are always getting the most up-to-date version of the content. HTTP 304 responses are used to indicate this is working.
An HTTP request with the request header If-Modified-Since with a value of Tue, 18 Nov 2025 15:04:40 GMT was sent, and an HTTP 304 was responded with.
Maximum possible points
30
What is this check, and why should you care
Having your application set a cookie often makes it difficult to cache in any reverse proxies or CDNs.
Maximum possible points
20
What is this check, and why should you care
The time that it takes for a user's browser to receive the first byte of page content.
The lower the TTFB, the faster your site will be perceived by the end user.
To get maximum points, your TTFB must be less than or equal to 30ms. If your TTFB is more than 1 second then you get no points here.
Maximum possible points
50
What is this check, and why should you care
The purpose of HTTP compression is to reduce the size of the files sent by a CDN/web server by eliminating redundant information in those files. The smaller the size of the files, the more quickly they can be served over the World Wide Web.
On top of faster delivery, compression also reduces the amount of bandwidth used by the CDN/web server. This is especially important for mobile devices, where the bandwidth is often limited.
The response header Content-Encoding had a value of gzip.
See the Wikipedia page on HTTP compression for more background.
To get maximum points, you need to use Brotli or Zstandard compression.
Maximum possible points
20
What is this check, and why should you care
Using a caching proxy is extremely useful for caching purposes.
Maximum possible points
50
What is this check, and why should you care
Using a CDN is extremely useful for caching purposes.
Maximum possible points
50
What is this check, and why should you care
Using ETag identifiers is an easy way to ensure your visitors are always getting the most up-to-date version of the content. This mechanism allows caches to be more efficient and saves bandwidth, as a Web server does not need to send a full response if the content has not changed. HTTP 304 responses are used to indicate this is working.
No ETag header was found in the response.
See the Wikipedia page on ETag for more background.
To get maximum points, you need to have ETag identifiers and an HTTP 304 response must be received when using a valid If-None-Match request header.
Maximum possible points
30
What is this check, and why should you care
Caching HTTP 404s is a great way to offload requests from your origin.
To get maximum points, you need to have the ability to cache an HTTP 404 for any amount of time.
This check requested the URL https://mainstagerehearsal.com/cachingscorebrokenurltest.
Maximum possible points
20
Image checks
Performed on the asset: https://mainstagerehearsal.com/wp-content/smush-webp/2022/03/studio_3_4616.jpg.webp
See the HTTP headers for this image file.
What is this check, and why should you care
Using ETag identifiers is an easy way to ensure your visitors are always getting the most up-to-date version of the content. This mechanism allows caches to be more efficient and saves bandwidth, as a Web server does not need to send a full response if the content has not changed. HTTP 304 responses are used to indicate this is working.
An HTTP request with the request header If-None-Match with a value of "8da0-62ee6951892d8" was sent, and an HTTP 304 was responded with.
See the Wikipedia page on ETag for more background.
To get maximum points, you need to have ETag identifiers and an HTTP 304 response must be received when using a valid If-None-Match request header.
Maximum possible points
3
What is this check, and why should you care
Using Last-Modified headers is an easy way to ensure your visitors are always getting the most up-to-date version of the content. HTTP 304 responses are used to indicate this is working.
An HTTP request with the request header If-Modified-Since with a value of Mon, 24 Feb 2025 17:22:19 GMT was sent, and an HTTP 304 was responded with.
Maximum possible points
3
CSS checks
Performed on the asset: https://mainstagerehearsal.com/wp-content/plugins/booknetic/app/Frontend/assets/css/bootstrap-booknetic.css?v=4.8.13&ver=6.8.3
See the HTTP headers for this CSS file.
What is this check, and why should you care
Using Last-Modified headers is an easy way to ensure your visitors are always getting the most up-to-date version of the content. HTTP 304 responses are used to indicate this is working.
An HTTP request with the request header If-Modified-Since with a value of Mon, 03 Nov 2025 15:17:52 GMT was sent, and an HTTP 304 was responded with.
Maximum possible points
3
What is this check, and why should you care
The purpose of HTTP compression is to reduce the size of the files sent by a CDN/web server by eliminating redundant information in those files. The smaller the size of the files, the more quickly they can be served over the World Wide Web.
On top of faster delivery, compression also reduces the amount of bandwidth used by the CDN/web server. This is especially important for mobile devices, where the bandwidth is often limited.
The response header Content-Encoding had a value of gzip.
See the Wikipedia page on HTTP compression for more background.
To get maximum points, you need to use Brotli or Zstandard compression.
Maximum possible points
2
What is this check, and why should you care
Using ETag identifiers is an easy way to ensure your visitors are always getting the most up-to-date version of the content. This mechanism allows caches to be more efficient and saves bandwidth, as a Web server does not need to send a full response if the content has not changed. HTTP 304 responses are used to indicate this is working.
An HTTP request with the request header If-None-Match with a value of "1371-642b23813d69e-gzip" was sent, but an HTTP 304 was not responded with. So you have Etags, but they are not doing anything.
See the Wikipedia page on ETag for more background.
To get maximum points, you need to have ETag identifiers and an HTTP 304 response must be received when using a valid If-None-Match request header.
Maximum possible points
3
Javascript checks
Performed on the asset: https://mainstagerehearsal.com/wp-includes/js/jquery/jquery.min.js?ver=3.7.1
See the HTTP headers for this Javascript file.
What is this check, and why should you care
Using Last-Modified headers is an easy way to ensure your visitors are always getting the most up-to-date version of the content. HTTP 304 responses are used to indicate this is working.
An HTTP request with the request header If-Modified-Since with a value of Wed, 03 Apr 2024 04:38:18 GMT was sent, and an HTTP 304 was responded with.
Maximum possible points
3
What is this check, and why should you care
The purpose of HTTP compression is to reduce the size of the files sent by a CDN/web server by eliminating redundant information in those files. The smaller the size of the files, the more quickly they can be served over the World Wide Web.
On top of faster delivery, compression also reduces the amount of bandwidth used by the CDN/web server. This is especially important for mobile devices, where the bandwidth is often limited.
The response header Content-Encoding had a value of gzip.
See the Wikipedia page on HTTP compression for more background.
To get maximum points, you need to use Brotli or Zstandard compression.
Maximum possible points
2
What is this check, and why should you care
Using ETag identifiers is an easy way to ensure your visitors are always getting the most up-to-date version of the content. This mechanism allows caches to be more efficient and saves bandwidth, as a Web server does not need to send a full response if the content has not changed. HTTP 304 responses are used to indicate this is working.
An HTTP request with the request header If-None-Match with a value of "15601-61529caa64280-gzip" was sent, but an HTTP 304 was not responded with. So you have Etags, but they are not doing anything.
See the Wikipedia page on ETag for more background.
To get maximum points, you need to have ETag identifiers and an HTTP 304 response must be received when using a valid If-None-Match request header.
Maximum possible points
3
Font checks
Performed on the asset: https://mainstagerehearsal.com//mainstagerehearsal.com/wp-content/themes/Divi/core/admin/fonts/modules/all/modules.eot
See the HTTP headers for this Javascript file.
What is this check, and why should you care
Having your application set a cookie often makes it difficult to cache in any reverse proxies or CDNs.
Maximum possible points
20
What is this check, and why should you care
Using ETag identifiers is an easy way to ensure your visitors are always getting the most up-to-date version of the content. This mechanism allows caches to be more efficient and saves bandwidth, as a Web server does not need to send a full response if the content has not changed. HTTP 304 responses are used to indicate this is working.
No ETag header was found in the response.
See the Wikipedia page on ETag for more background.
To get maximum points, you need to have ETag identifiers and an HTTP 304 response must be received when using a valid If-None-Match request header.
Maximum possible points
3
What is this check, and why should you care
Using Last-Modified headers is an easy way to ensure your visitors are always getting the most up-to-date version of the content. HTTP 304 responses are used to indicate this is working.
No Last-Modified header was found in the response.
Maximum possible points
3
What is this check, and why should you care
The purpose of HTTP compression is to reduce the size of the files sent by a CDN/web server by eliminating redundant information in those files. The smaller the size of the files, the more quickly they can be served over the World Wide Web.
On top of faster delivery, compression also reduces the amount of bandwidth used by the CDN/web server. This is especially important for mobile devices, where the bandwidth is often limited.
No Content-Encoding header was found in the response.
See the Wikipedia page on HTTP compression for more background.
To get maximum points, you need to use Brotli or Zstandard compression.
Maximum possible points
2
HTTP Response headers
| Name | Value |
|---|---|
| Status Code | HTTP 200 |
| Accept-Ranges | bytes |
| Cache-Control | max-age=3, must-revalidate |
| Content-Encoding | gzip |
| Content-Length | 51061 |
| Content-Type | text/html; charset=UTF-8 |
| Date | Tue, 18 Nov 2025 15:30:00 GMT |
| Expires | Tue, 18 Nov 2025 15:30:03 GMT |
| Last-Modified | Tue, 18 Nov 2025 15:04:40 GMT |
| Server | Apache |
| Vary | Accept-Encoding,Cookie |
If you want to do this yourself
You can use the following cURL command:
curl -sLIXGET -H 'Accept-Encoding: br, zstd, gzip, deflate' 'https://mainstagerehearsal.com/' | sort