I have 32-bit Toad for Oracle Beta version 188.8.131.52 installed side-by-side an install of 32-bit Toad for Oracle 184.108.40.206 on the same computer.
In general, the performance of the Toad for Oracle 12.7 beta, is slower than Toad for Oracle 220.127.116.11. As I connect more database sessions, the performance of the Toad for Oracle 12.7 beta degrades much more quickly than Toad for Oracle 18.104.22.168.
When only one database session is connected, the Toad for 12.7 beta runs quickly. However I do a great deal of work comparing and synchronizing data schemas using Toad, and so commonly I open 8 - 12 database session simultaneously. With 8 - 12 active database sessions, Toad for Oracle 22.214.171.124 runs a bit slow, but is stable and usable. When I open 8 - 12 database sessions simultaneously with Toad for 12.7 beta, the program slows down considerably. With 8 - 12 active database sessions, the Toad for 12.7 beta freezes for several seconds during simple operations like opening a PLSQL procedure for editing. With 8 - 12 active database sessions, the Toad for 12.7 beta often hangs entirely and must be restarted. When doing this testing, I was connecting to Oracle development instances on my local subnet.
My Toad for Oracle 12.7 beta and Toad for Oracle 126.96.36.199 installs use the same settings.
When I run the Toad Advisor on either software, the following is displayed under performance suggestions:
Highlight tables names is on
Highlight view names is on
Highlight stored procedure names is on
Code Insight results are being cached
Public synonyms are included in Code Insight results
*** I am running Toad with the minimal live help enabled. If I start to enable live help items like Codes Analysis - Check Rules as You Type, Toad slows down extremely.
In the single database session situations, these slowdowns are barely noticeable, but that is not the way I use Toad.
My PC running Toad has a i5-3470 CPU (3.2 Ghz), 64-bit Windows 7 and 8GB of RAM.