Fast copy indexes between two deployments

I've tried to copy in the fast way indexes (of count 25 per ~40GB each of them)
I see that copy it over elasticdump it goes too very slow.

How can I increase performance???
another thing is how to use a wildcard for copy all matches indexes from source?

docker run --rm -ti elasticdump/elasticsearch-dump \
  --output="*" \

Why not use snapshot and restore?

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