I tried to test a customer case of using bytea columns with the new lz4 compression. But lz4 support is not included in the standard binaries downloadable through the PostreSQL Website (from EDB). For easy testing with windows this should be enabled in the upcoming releases of pg14: not everybody is willing or capable of self-compiling a Windows distribution… I also noticed that VS2017 is still used for pg14. After two years it should be better to distribute the Windows version compiled with Visual Studio 2019 Environment: select version (); version --------------------------------------------------------------- PostgreSQL 14beta1, compiled by Visual C++ build 1914, 64-bit (1 Zeile) Thanks for investigating Hans Buschmann