Caching Score: https://www.energysustainabilityschemes.nsw.gov.au/

Summary

GradeB+

483/603

Requested URL checks

What is this check, and why should you care

Having a cache hit ensures the fastest possible delivery of content to end users.

The response header X-Cache had a value of TCP_MEM_HIT from a104-72-70-148.deploy.akamaitechnologies.com (AkamaiGHost/11.5.2-56372494) (-).

Akamai has documentation on how to interpret the X-Cache and X-Cache-Remote headers.

Maximum possible points

100

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

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.

In order 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

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 "1718276741" was sent, and an HTTP 304 was responded with.

Akamai has documentation on how to enable Etag support (requires login).

See the Wikipedia page on ETag for more background.

In order 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

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 Thu, 13 Jun 2024 11:05:41 GMT was sent, and an HTTP 304 was responded with.

Maximum possible points

30

What is this check, and why should you care

Having tiered caching can help improve the cache hit ratio of your site because it provides an additional layer of caching in front of your origin.

Maximum possible points

25

What is this check, and why should you care

Caching HTTP 404s is a great way to offload requests from your origin.

In order 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://www.energysustainabilityschemes.nsw.gov.au/cachingscorebrokenurltest.

Maximum possible points

20

What is this check, and why should you care

Akamai has very strict controls around cache tag lengths, counts and characters. If you exceed or break these controls then you risk your content not being invalidated when you issue a cache tag purge.

No issues found.

See the Akamai technical documentation on how to interpret this header.

Maximum possible points

10

What is this check, and why should you care

CSS aggregation reduces the number of assets your site needs to download. The filename contains a hash of all the file contents, meaning you can cache these files for an extremely long time with no negative consequences.

Maximum possible points

10

What is this check, and why should you care

Javascript aggregation reduces the number of assets your site needs to download. The filename contains a hash of all the file contents, meaning you can cache these files for an extremely long time with no negative consequences.

Maximum possible points

10

What is this check, and why should you care

Drupal 9.5+ introduces a new debug setting to make it easier to debug render caching. This setting will add cache debugging output for each rendered element.

The main issue with this is that this slows down your page loads (on top increasing your page weight).

In order to get maximum points, you must disable the render cache debug.

Maximum possible points

10

What is this check, and why should you care

Drupal 7+ provides a Statistics module to which records content view statistics in Drupal's database.

The main issue with this module is that it sends an un-cacheable HTTP POST request to your site to record a 'content view' statistic. This does not scale well as you Drupal site gets more traffic.

In order to get maximum points, you must disable the statistics module.

Maximum possible points

10

What is this check, and why should you care

Drupal 8+ uses Twig for templating, and the Twig template engine offers a debug tool to which emits out a list of template filenames in the HTML source.

The main issue with this is that you often also have other Twig related performance issues as well, e.g. automatic reloading.

In order to get maximum points, you must disable Twig debug.

Maximum possible points

10

What is this check, and why should you care

You can increase the cache hit rate of your site by stripping certain query parameters from the cache key.

FBCLID is one such parameter that can be stripped by your caching server. This query parameter only really serves a purpose for Javascript to read, and Javascript can still read it from the browser URL.

This check requested the URL https://www.energysustainabilityschemes.nsw.gov.au/?fbclid=1718276866.

Maximum possible points

10

What is this check, and why should you care

You can increase the cache hit rate of your site by stripping certain query parameters from the cache key.

GCLID and GCLSRC are two such parameters that can be stripped by your caching server. These query parameters only really serve a purpose for Javascript to read, and Javascript can still read it from the browser URL.

This check requested the URL https://www.energysustainabilityschemes.nsw.gov.au/?gclsrc=1718276866&gclid=1718276866.

Maximum possible points

10

What is this check, and why should you care

You can increase the cache hit rate of your site by stripping certain query parameters from the cache key.

UTM is a collection of parameters that can be stripped by your caching server. These query parameters only really serve a purpose for Javascript to read, and Javascript can still read them from the browser URL.

This check requested the URL https://www.energysustainabilityschemes.nsw.gov.au/?utm_source=1718276866&utm_medium=1718276866&utm_campaign=1718276866&utm_id=1718276866.

Maximum possible points

10

What is this check, and why should you care

There is a SPAM protection module in Drupal called Honeypot.

The honeypot module has a feature that adds a time based hidden form field to forms to protect against bots filling them in too quickly. This is a nice feature, however it happens to disable caching for the entire page. This is terrible for high traffic sites.

It is recommended to disable this time based feature, and only use the core honeypot feature of a hidden input field.

Maximum possible points

5

What is this check, and why should you care

There are 2 filesystems in Drupal - public files and private files.

Private files force Drupal to bootstrap in order to serve the file, and access control is checked every single time. This is useful for sensitive files, but a hindrance when your site is under high load.

It is recommended to use Drupal's public file system for static, non-sensitive files, and reserve the use of private files for dynamic, or sensitive files.

Maximum possible points

5

What is this check, and why should you care

Using a long cache lifetime helps to ensure a high cache hit rate.

In order to get maximum points, your cache lifetime must be greater than or equal to 4 weeks. If your cache lifetime is less, then you will get some proportion of the score based on how close to 4 weeks you are.

Current cache lifetime is 900 seconds (15 minutes).

Maximum possible points

100

What is this check, and why should you care

Drupal 8+ provides an Internal Page Cache module that is recommended for small to medium-sized websites.

There is value in using this module, even when you are using Akamai, due to the low cache lifetime of 15 minutes.

In order to get maximum points, you must enable the page_cache module, and have a HIT on Drupal's page cache.

See Drupal's documentation on the Internal Page Cache module. Also, Wim Leers wrote a really awesome blog post on the release of this module with important background.

Maximum possible points

20

Image checks

Performed on the asset: https://www.energysustainabilityschemes.nsw.gov.au/sites/default/files/styles/banner_image/public/2022-05/ES_homepage_background.jpg?itok=2vHhrtWC

See the HTTP headers for this image file.

What is this check, and why should you care

Having a cache hit ensures the fastest possible delivery of content to end users.

The response header X-Cache had a value of TCP_MEM_HIT from a104-72-70-148.deploy.akamaitechnologies.com (AkamaiGHost/11.5.2-56372494) (-).

Akamai has documentation on how to interpret the X-Cache and X-Cache-Remote headers.

Maximum possible points

10

What is this check, and why should you care

Using a long cache lifetime helps to ensure a high cache hit rate.

In order to get maximum points, your cache lifetime must be greater than or equal to 4 weeks. If your cache lifetime is less, then you will get some proportion of the score based on how close to 4 weeks you are.

Current cache lifetime is 2628001 seconds (1 month and 2 days).

Maximum possible points

10

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 "62903a5d-3ace" was sent, and an HTTP 304 was responded with.

Akamai has documentation on how to enable Etag support (requires login).

See the Wikipedia page on ETag for more background.

In order 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 Fri, 27 May 2022 02:41:33 GMT was sent, and an HTTP 304 was responded with.

Maximum possible points

3

CSS checks

Performed on the asset: https://www.energysustainabilityschemes.nsw.gov.au/sites/default/files/css/css_ayorVb9Pz0Sq5p4mm5zqP_fqmftGNr3srpl5V_xXSGQ.css?delta=0&language=en&theme=ipartblue&include=eJxdyEsOwjAMBcALmeZIyEld15LzkV-yCKeHHYLdaLR3dXlyY9_TCpL-BWFjSk2ZIVScgf3jKgCrgEoPSa1HZbeXkA2OmX1JUu-Z_YG53ZrS51mDx410xhrsx3eO1cbKbrjlpNpPu0wCyZrNNxzKQn8

See the HTTP headers for this CSS file.

What is this check, and why should you care

Having a cache hit ensures the fastest possible delivery of content to end users.

The response header X-Cache had a value of TCP_MEM_HIT from a104-72-70-148.deploy.akamaitechnologies.com (AkamaiGHost/11.5.2-56372494) (-).

Akamai has documentation on how to interpret the X-Cache and X-Cache-Remote headers.

Maximum possible points

10

What is this check, and why should you care

Using a long cache lifetime helps to ensure a high cache hit rate.

In order to get maximum points, your cache lifetime must be greater than or equal to 4 weeks. If your cache lifetime is less, then you will get some proportion of the score based on how close to 4 weeks you are.

Current cache lifetime is 2628001 seconds (1 month and 2 days).

Maximum possible points

10

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 "664d2450-1b98" was sent, and an HTTP 304 was responded with.

Akamai has documentation on how to enable Etag support (requires login).

See the Wikipedia page on ETag for more background.

In order 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 Tue, 21 May 2024 22:46:40 GMT was sent, and an HTTP 304 was responded with.

Maximum possible points

3

Javascript checks

Performed on the asset: https://www.energysustainabilityschemes.nsw.gov.au/sites/default/files/js/js_gZo2cY1KszKim1P4-Ou-gFn7DQOU4pQjXSn6XxZBJBw.js?scope=footer&delta=0&language=en&theme=ipartblue&include=eJxdyEsOwjAMBcALmeZIyEld15LzkV-yCKeHHYLdaLR3dXlyY9_TCpL-BWFjSk2ZIVScgf3jKgCrgEoPSa1HZbeXkA2OmX1JUu-Z_YG53ZrS51mDx410xhrsx3eO1cbKbrjlpNpPu0wCyZrNNxzKQn8

See the HTTP headers for this Javascript file.

What is this check, and why should you care

Having a cache hit ensures the fastest possible delivery of content to end users.

The response header X-Cache had a value of TCP_MEM_HIT from a104-72-70-148.deploy.akamaitechnologies.com (AkamaiGHost/11.5.2-56372494) (-).

Akamai has documentation on how to interpret the X-Cache and X-Cache-Remote headers.

Maximum possible points

10

What is this check, and why should you care

Using a long cache lifetime helps to ensure a high cache hit rate.

In order to get maximum points, your cache lifetime must be greater than or equal to 4 weeks. If your cache lifetime is less, then you will get some proportion of the score based on how close to 4 weeks you are.

Current cache lifetime is 2628001 seconds (1 month and 2 days).

Maximum possible points

10

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 "664d2450-25c8e" was sent, and an HTTP 304 was responded with.

Akamai has documentation on how to enable Etag support (requires login).

See the Wikipedia page on ETag for more background.

In order 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 Tue, 21 May 2024 22:46:40 GMT was sent, and an HTTP 304 was responded with.

Maximum possible points

3

HTTP Response headers

Name Value
Status Code HTTP 200
Cache-Controlmax-age=900, public
Connectionkeep-alive, Transfer-Encoding
Content-Languageen
Content-Typetext/html; charset=UTF-8
DateThu, 13 Jun 2024 11:07:46 GMT
ETag"1718276741"
Edge-Cache-Tag44d0p 6rkl4 6ogi7 5h311 38bd8 598pl 66b9c 425gt 64b62 4p06m hvdcm 33nrc 25h1j 20g31 7lgku 6l6kv 3p8cd 2jjd1 2cuo6 6pb83 8vr4r 48lvh 6fpl4 44umq gdqo4 52a7k cqf76 2ol5i gl5sm 46rpn 2p1sj 4q1m7 6g12t 43png 6ijmp 72v4v 3a5ei a4e99 6ml1p 6q3te 42ul9 4tlgs 4bc81 71j85 41tuu 5cn3u 5n1h6 3eusg 52fom 5ui4h 4e40d 1u3mg 1un46 6vl36 352rr 9rl6c 693ee 45r73 4fd76 25fd5 36rc1 3rf4j 557v1 51fmc 30p05 7jnqm t70fr 70r8h 52mup 3kgft 5dmu1 69t4b 390k5 29lfg 2oesf 1mf5f 1qn37 ejf95 7oo2o 7ai29 77el8 3f21j 719dm 3j6j5 2doa3 32u9t 3ln70 unoqm 1a3vr j7i7p 1rc3n 13l9l 1ol3m 4mnki 2r7ar 47d4k 2cr88 2vo9f 3e482 1iu8f 2tkvv 1ka97 29e3b 2p0af 62iq0 4lgv1 5mpn7 1eo6d 3qklp 489r8 1nkef 1aeic 15vu7
ExpiresSun, 19 Nov 1978 05:00:00 GMT
Last-ModifiedThu, 13 Jun 2024 11:05:41 GMT
Transfer-Encodingchunked
VaryAccept-Encoding
X-CacheTCP_MEM_HIT from a104-72-70-148.deploy.akamaitechnologies.com (AkamaiGHost/11.5.2-56372494) (-)
X-Cache-KeyS/L/84022/862780/1d/www.energysustainabilityschemes.nsw.gov.au/
X-Cache-Key-Extended-Internal-Use-OnlyS/L/84022/862780/1d/www.energysustainabilityschemes.nsw.gov.au/ vcd=6147
X-Check-CacheableYES
X-Lagoonamazeeio-govcms5>sigsci-ingress-nginx>ess-master:nginx>

If you want to do this yourself

You can use the following cURL command:

curl -sLIXGET -H 'Pragma: akamai-x-cache-on, akamai-x-cache-remote-on, akamai-x-check-cacheable, akamai-x-get-cache-key, akamai-x-get-cache-tags' 'https://www.energysustainabilityschemes.nsw.gov.au/' | sort