I'm reading this User Guide and it mentions that "typically" snowpipe takes 1 minute to load the data. In my experiments I found that it takes a minute always. Where is this 1 minute latency coming from? It feels like there is some batch processing going on per minute. Is there a setting somewhere to reduce it further down.
As of today, there's no setting to reduce this latency - you're essentially microbatching to the minute by minute level.
If you want to do more frequent updates, your best option is to keep a warehouse running and either submit UPDATE or COPY queries to it.
If you don't require sub-minute latency, you should use Snowpipe and potentially a tool like Kinesis Firehose to batch up records into a single file that drops into S3 once per minute.