v4.0.0

Please note that v4 contains braking changes - please see notes on migration from v4 in readme.

• init user page
• top bar css enhancements
• status code distribution
• request stats search enhancements (not, or operators)
• display number of total requests
• monitoring stats reworked
• label chart timezone and chart options fix
• mongodb ditched, postgres replaced by timescaledb
• scenario zero error tolerance settings
• deleting samples data after processing settings
• scenario trends chart order fix
• Item statistics settings per project