Spark
spark.
Measured manually by one of our team, 19 to 29 October
In October 2026, an average page view on Spark’s website weighed at least 5.68 MB: 2nd heaviest of 11 New Zealand telcos and broadband providers we scored.
Gradei
Grade G
- A+
- A
- B
- C
- D
- E
- F
- G
- H
Absolute unit.
At least5.68 MBAn average page viewi
Range this month: 5.07 to 5.76 MBi
Still downloading when we stopped measuring, so this website weighs more than this. What “at least” means
Heaviest page: Coverage, 9.05 MB. This blends the phone and the laptop, and the page as a first page and as a later page, the first page counting three times as much. Each page’s figures
Over time
| October 2026 | 5.68 MB |
|---|
First measured October 2026.
Among telcos and broadband
Rank, lightest firsti
2nd heaviest of 11
- Spark
Phone and laptopi
Homepage, first page
Phone
4.58 MB
Laptop
5.97 MB
The five pages
Homepage
/
First page
Phone 4.58 MB
Laptop 5.97 MB
Later page
Phone 2.97 MB
Laptop at least 4.35 MB
Mobile plans
/
online/ shop/ mobile-plans First page
Phone 6.35 MB
Laptop 6.42 MB
Later page
Phone 4.74 MB
Laptop 5.13 MB
Broadband
/
online/ shop/ broadband First page
Phone 4.67 MB
Laptop at least 4.60 MB
Later page
Phone 1.89 MB
Laptop at least 1.89 MB
Coverage
/
shop/ mobile/ network/ First page
Phone 9.08 MB
Laptop 9.44 MB
Later page
Phone 8.39 MB
Laptop 8.41 MB
Contact
/
help/ contacts/ support/ phone-numbers First page
Phone 5.88 MB
Laptop 5.65 MB
Later page
Phone 0.77 MB
Laptop 0.82 MB
Whose weight it is
Homepage, first page on a phone, 4.58 MB
- 3.62 MB79%
Spark’s own files
This website
- 0.34 MB7%
Google Tag Manager
Tag manager
- 0.22 MB5%
Facebook
Advertising and social
- 0.16 MB3%
TikTok
Advertising and social
- 0.02 MB0%
LinkedIn Ads
Advertising and social
- 0.21 MB5%
Unknown source
What it is made ofi
Homepage, first page on a phone, 4.58 MB
Scripts
2.43 MBImages
1.98 MBFonts
0.11 MBOther
0.03 MBStyles
0.02 MB
The heaviest files
Across the pages we measured
File · Unknown source
docs.google.com/spreadsheets/d/1PaXoGaf-_g7Gpm_ZvAtvD6Vs3p4xkJaLkTOoam1Csjc/gviz/tqpub
Coverage
2.61 MB
Image · Spark
duo-large-tile-lockup-606x736.png
Homepage
1.23 MB
Script · Spark
_app-d7a2deffb9b2042a.js
Mobile plans
0.91 MB
Script · Spark
_app-bb3567b288a1aeb9.js
Mobile plans
0.91 MB
Script · Spark
clientlib-react.lc-7fc838310a72cbce719aa6d5e90a3bbf-lc.min.js
Broadband and 1 more
0.91 MB
We found 9 savings. Here are the 5 biggest.
- Fix
- Nothing a visitor would notice
- Choice
- Removes or delays something
Worked out on a phone and a laptop. The icons show where each saving applies.
- Fix
Compress 40 of your own text files
Every page · Spark
Saves this on every page
at least 1.18 MB
- Choice
Google CDN: you choose whether it loads
Coverage and 1 more · Google CDN Phone
Coverage, Contact
Saves most on the Coverage page
up to 0.92 MB
- Fix
Ship less of your own code: scripts and styles that did not run while the homepage loaded
Every page · Spark Phone
Saves this on every page
up to 0.39 MB
- Choice
Check every marketing tag still earns its place: 5 companies
Every page · several companies
Saves this on every page
up to 0.31 MB
- Fix
Cut 8 fonts down to the characters used
Every page · Spark
Saves this on every page
up to 0.24 MB
Carboni
If this website had 100,000 page views a year, they would cause about 51 kg of carbon emissions.
Built to grade A (an average page view of 0.53 MB or less), the same page views would cause about 4.8 kg.
Your traffic
Optional, for an average page view. Worked out on your screen, never sent to us.
Add your grade to your website
A grade C badge needs an average page view of 1.41 MB or less. Spark’s is at least 5.68 MB.