All tests run on an 8-year-old MacBook Air. You're transferring a batch of large files over MTP. The...
MTP batch transfers experience speed drops at every file boundary due to mandatory protocol negotiation cycles (SendObjectInfo + SendObject) and device flash controller commit time — structural overhead that cannot be engineered away. For teams evaluating Android file-transfer tooling, ADB offers lower per-file overhead but slower single-file peak; MTP remains protocol-bound regardless of client implementation quality.
All tests run on an 8-year-old MacBook Air.
You're transferring a batch of large files over MTP. The first one flies at 45 MB/s. Then the second file starts — and you're at 30 MB/s. The third is slower still.
Nothing changed. Same cable, same device, same app. So what's happening?
The Cause Is in the Protocol Itself
Between every file, MTP requires a full negotiation cycle — SendObjectInfo followed by SendObject. This isn't an implementation detail you can optimize away. It's how MTP works.
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