Makes pages load faster and stop jumping around, and shows the numbers before and after.
Deft against the best free skill we found for this job
A shop’s product pageSpeed score, out of 100
Before41out of 100
Deft99out of 100, highest
Free skill93out of 100
No skill88out of 100
A restaurant websiteSpeed score, out of 100
Before90out of 100
Deft98out of 100, tied highest
Free skill98out of 100, tied highest
No skill94out of 100
See the work and how we tested
How we tested
Each test sent the same request three ways: with Deft, with the best free skill we found for this job, and with no skill at all.
Speed was not judged: it was measured with Lighthouse 12.8.2, mobile, the middle of 5 runs, every version the same evening.
How we picked the free skill: our study's pick as the best free speed skill to beat, run with all its files readable (its one optional script was not run).
The businesses are made up. Each result is that version’s own work, unedited, from the request shown.
The work
A shop’s product page
The request
The jacket page of my outdoor gear shop, Larch Supply (index.html), is really slow on phones, and the page jumps around while it loads. PageSpeed gives it a terrible mobile score. Can you make it fast? It's plain HTML, CSS and JavaScript with no build step.
Every number Lighthouse measured: a shop’s product page
Measure
Before
Deft
Free skill
No skill
Speed score
41
99
93
88
Main content shows
12.91 s
1.82 s
2.79 s
3.11 s
Page jumps
0.149
0.005
0
0
Frozen by scripts
438 ms
0 ms
0 ms
0 ms
A restaurant website
The request
My restaurant's website, Bistro Marlo in Vienna, loads slowly on phones. Guests tell me it takes ages to show anything on mobile data. I made it with Lovable and it's in Tailwind. Can you speed it up?
Every number Lighthouse measured: a restaurant website