Python things

Speeding Up Global Variable Access in Python

Here is a summary of some of the proposals on the table. I drew some diagrams of a test case to force myself to work out the details of each proposal, and to attempt to illuminate them for discussion. Except for the "guido2b" images, each diagram shows the state of things after "import spam".

Jeremy 1: the dlict scheme: Jeremy's description
small GIF
big TIFF
Illustrator file
Guido 1: the original cellptr/objptr scheme: Guido's description
small GIF
big TIFF
Illustrator file
Ping 1: guido1 + a tweak to always use two dereferencing steps: Ping's description
small GIF
big TIFF
Illustrator file
Tim 1: timdicts and cells with shadow flags: Tim's description
small GIF
big TIFF
Illustrator file
Guido 2: the globals_vector scheme: Guido's description
small GIF, after import, after function call
big TIFF, after import, after function call
Illustrator file