How-to run code from flash

Let me use this snippet and make the difference visible with process.memory().

• no optimization

  process.memory();
  ={ free: 1267, usage: 333, total: 1600, history: 170,
  gc: 0, gctime: 1.862 }

• module uploaded as function

  process.memory()
  ={ free: 1265, usage: 335, total: 1600, history: 170,
  gc: 0, gctime: 1.862 }

• use module from flash

  process.memory()
  ={ free: 1357, usage: 243, total: 1600, history: 60,
  gc: 0, gctime: 1.874 }

• freeHeap is for all cases 11736

how many vars you save depends on the size of the module .
Running SH1106 from storage saves round about 90 vars.

That should justify the extra effort ;-)

ESP8266_4MB board has now 48 pages to store any stuff you like, check the build content

Hint: At the moment storage is only working for the first segment, read issue #1507

Why not write a script as workaround until someone adds this feature into the WebIDE or command line tool

• scan modules in source file
  
• create a min version of the modules of not exist
  
• create a store_modules.js
  
• upload store_modules.js
  
• upload source and you are done.