more v3 notes

v3.md

@@ -34,6 +34,10 @@ Organize errors better
 
 Remove circular dependency between Conn and ConnPool such that ConnPool depends on Conn, but Conn doesn't know anything about ConnPool
 
+Or maybe double-down on conn/pool coupling and improve connpool
+
+Add auto-idle pinging to conns in pool
+
 Extract types Null* and Hstore to separate package
 
 Remove names from prepared statements - use database/sql style objects
@@ -42,14 +46,13 @@ Better way of handling text/binary protocol choice than pgx.DefaultTypeFormats o
 
 Also maybe support binary and text for everything possible
 
-Copy protocol support (this potentially ties in with text/binary protocol)
-ValueReader / msgReader cleanup
+dValueReader / msgReader cleanup
 
 Make easier / possible to mock Conn or ConnPool (https://github.com/jackc/pgx/pull/162)
 
 Every field that should not be set by user should be replaced by accessor method (e.g. Conn.PID, Conn.SecretKey)
 
-Investigate strongly typed queries. i.e. Some sort of interface where varargs of Query, Exec, and Scan wouldn't happen. Need to be some low-level interface where (probably generated) functions could (more or less) directly read and write to the connection.
+Investigate strongly typed queries. i.e. Some sort of interface where varargs of Query, Exec, and Scan wouldn't happen. Need to be some low-level interface where (probably generated) functions could (more or less) directly read and write to the connection. Clean code and type-safety / control would be the benefits. Row scanning performance is already so fast there is little to improve (go_db_bench shows under 1 microsecond per row).
 
 Reject scanning non-string like things into a string (e.g. binary encoded timestamptz to string). See https://github.com/jackc/pgx/issues/223