EMQ X 4.3.1 is released now, it mainly includes the following changes:

emqx

Bug fixes:

• Performance consumption increases exponentially with the number of topic levels after route compression

  Github PR: emqx#4800

• Fix poor large frame concatenation performance

  Github Issue: emqx#4787 Github PR: emqx#4802

• Newly added shared subscription strategy is unavailable

  Github Issue: emqx#4808 Github PR: emqx#4809

• Fixed the incorrect implementation of metrics/stats for retained messages and messages of delayed publish

  Github PR: emqx#4778, emqx#4778

• All logs in JSON format are output on the same line

  Github PR: emqx#4778