The 2018 Retina MacBook Air was announced a while back and here we have some numbers that show how well it performs as compared to the previous model. Geekbench tests show that the Retina MacBook Air with Core i5 processor was able to score about 4200 points in the single-core test and around 7800 points in the multi-core tests.
Compared to the previous model, the new 2018 Retina MacBook Air performs 27% better in the single-core test and 28% better in the multi-core test. While this is a synthetic benchmark, it does show us that the new MacBook Air is a significant upgrade over the previous generation model.
The new MacBook Air also performs better than the 12-inch MacBook. The MacBook Air performs 20% better in single-core tests and 17% better in multi-core tests. Moving on to the mid-2017 MacBook Pro without Touch Bar, which scored 4314 points in the single-core test and is 16% faster when comparing multi-core performance. You need to note that this model is $100 more expensive than the new MacBook Air.
The 2018 13-inch MacBook Pro is able to score 16464 in the multi-core test and 4504 points in the single-core test. While the single-core performance is pretty close to the 2018 Retina MacBook Air, the Pro model has more cores and is able to beat the Air in the multi-core test.
This is a synthetic benchmark so you need to take this with a grain of salt. This might not translate too well into real-world performance. But it does provide an insight into what you can expect. This is also a leak and you should wait until the MacBook Air is released so that third-parties can do their own tests.
If these numbers are indeed true then that means that the 2018 Retina MacBook Air is a pretty solid laptop. Especially when compared to the older model. If you have the older model then the new version is a significant upgrade. While the 2018 Retina MacBook Air does seem a bit expensive starting at $1100, it is still the least expensive model that comes with a retina display.