Is SD / microSD IO performance / throughput comparable to Solid State Disks

I'm under the impression that SD memory is a non-volatile memory
& so is SSD.

However are SD memory's throughput / performance comparable
to that of SSD since SD card's IO did not involve any mechanical
movements / spinning ?

Or is SD's throughput limited by the built of the SD slot in our laptops
just like USB 1.1 & USB 2.0 & USB 3.0 are limited due to the design
of the USB ports ?
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Aaron TomoskySD-WAN SimplifiedCommented:
There are classes of sd cards. So look at class 6 and 10 for the faster speeds. However yes you would also be limited by the speed of the reader.

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dbruntonQuid, Me Anxius Sum?  Illegitimi non carborundum.Commented:
PowerEdgeTechIT ConsultantCommented:
The best SD cards are around 45MB/s, the best SSD's are around 500MB/s ... not really comparable.
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