[List] Summary of Denis Migdal's issues

[denis-migdal]

Requiring Pierre opinion (3):

• Which solution do you prefer for addMethod ?
  Added generateArgs() function #2308 (comment)
• Your opinion on making fake prototype chains.
  Class and inheritance properties lost in JS <=> Brython conversions #2253 (comment)
• Your opinion on 2 suggestions to better handle None, null, and undefined ?
  null/undefined/None comparisons, and None Bry=>JS conversion. #2272 (comment)

Current tasks for Denis (3)

• Add a addMethod for list.__init__ (require Pierre input for next step).
  [OPTIMISATION] Python method implemented in JS: improving them ? #2306
• Add output mode options for Brython AOT (ES6 module, keep Python, etc).
  [Project] Produce standalone ES6 modules. #2292
• Test alternative position encoding on performances.
  [OPTIMISATION] Optimisations for DEBUG informations (easily done, big performances) #2270 (comment)

Bugs (1)

• JS Array aren't lists (should it convert ?)
  isinstance not working with JS arrays #2325

Brython features requests (3)

• Allow to choose Brython version in the Editor/Console.
  [Project] Produce standalone ES6 modules. #2292 (comment)
• Add an option to auto-import the content of JS window into Brython globals().
• Add "JS vs Brython API vs CPython vs Emscriptem CPython vs Brython JS-DOM API vs Brython preconverted into JS" benchmarks+test results ?
  (I can get students on it for a project)

Brython-Javascript interactions (5)

• Make a fake prototype chain for Brython objects.
  Class and inheritance properties lost in JS <=> Brython conversions #2253
• Better handling of None, null, and undefined (2 solutions suggested).
  null/undefined/None comparisons, and None Bry=>JS conversion. #2272 (comment)
• Keep symmetric Brython <=> JS conversions.
  window.Date == window.Date returns False [Potential HUGE performances increase] #2249
  [OPTIMISATION] Implements str as string with prototype replacement. #2269
  [CODE CLEANING/OPTI/BUG FIX] Improve List/Tupple/Array conversions #2299
• Use BigInt to implement int.
  Implements Integer as a BigInt ? #2268
• AOT for Brython (with watch mode).
  [Project] Produce standalone ES6 modules. #2292

Improve JS code generated by AST (5)

• Rewrite generated code related to conditions and booleans.
  [OPTIMISATION] Better conditions transcriptions from AST inside if/while/!/bool() #2274
• Optimize function calls
  [OPTIMISATION] improve performances upon fct call #2275
• Optimize argument parsing
  [OPTIMISATION] Improving argument parsing #2283
• Alternative position encoding (+ set it as first arg ?)
  [OPTIMISATION] Optimisations for DEBUG informations (easily done, big performances) #2270
• Replace concat by spread operator in arguments
  [List] Several HUGE performances optimisations. #2260 (comment)

Optimise Brython code written in JS (6)

Requires to rewrite JS files by hand little by little (50k+ lines).

• Optimize function calls
  [OPTIMISATION] improve performances upon fct call #2275
• Optimize argument parsing
  [OPTIMISATION] Improving argument parsing #2283
• Use native JS functions instead of re-implementing them
  • For strings
  • Use string encode/decode in bytes.js ?
    str.replace : well... why not using JavaScript's string replace ? #2267
• Factorize checks
  Factorize assertions + Option "checks-mode=unsafe" to optimize runtime #2266
• Several other suggestions
  [OPTIMISATION] Python method implemented in JS: improving them ? #2306
• Good practices (search in code)
  • Pre-allocate array when possible
  • use ++i instead of i++ when possible
  • use string template litteral
  • optimise algos
  • handle errors firsts
  • use new Brython functions
  • use let/const
    [List] Several HUGE performances optimisations. #2260 (comment)
    [List] Several HUGE performances optimisations. #2260

Brython helpers (3)

• New API for correct and safe use of Webcomponent
  Safe use of Web Component #2265
• Modify browser.template for safer use (code given)
  browser.template.Template should NOT render the outer HTML #2240 (comment)
• browser.template throws "TypeError" when done on body (object doesn't support selection by selector).

Documentation suggestions

See #2257

Unsolved issues (16 + 2PR)

Open PR:

• Added generateArgs() function #2308
• Use JS/Python prototype instead of conditions to choose the correct JS <=> Brython conversion method #2300

Open issues:

• isinstance not working with JS arrays #2325
• [OPTIMISATION] Python method implemented in JS: improving them ? #2306
• [CODE CLEANING/OPTI/BUG FIX] Improve List/Tupple/Array conversions #2299
• [Project] Produce standalone ES6 modules. #2292
• [OPTIMISATION] Improving argument parsing #2283
• [FEATURE] Suggestions to improve imports #2276
• [OPTIMISATION] improve performances upon fct call #2275
• [OPTIMISATION] Better conditions transcriptions from AST inside if/while/!/bool() #2274
• null/undefined/None comparisons, and None Bry=>JS conversion. #2272
• [OPTIMISATION] Optimisations for DEBUG informations (easily done, big performances) #2270
• [OPTIMISATION] Implements str as string with prototype replacement. #2269
• str.replace : well... why not using JavaScript's string replace ? #2267
• Factorize assertions + Option "checks-mode=unsafe" to optimize runtime #2266
• Safe use of Web Component #2265
• Class and inheritance properties lost in JS <=> Brython conversions #2253
• window.Date == window.Date returns False [Potential HUGE performances increase] #2249
• browser.template.Template should NOT render the outer HTML #2240

List of closed issues

Temporary closed issues:

• Implements Integer as a BigInt ? #2268

Closed PR:

• Using generate_args0 : -20% exec time??? #2316
• Fixing $B.args0 #2319
• Fix bugs for Brython AOT #2314
• Use sys.executable as per schmave suggestion #2302
• Fix CGI server #2301
• Tried to fix issue 2249 #2298
• Fix issue #1913 (server open to outside world by default) by adding new --ip option to server.py #2297
• Fix base not being search recursivelly in webcomponent.define() #2295
• Improve arguments parsing (see #2283) #2287

Closed issues:

•  Python error message not properly shown #2326
• [Feature/Opti] Using Python module written in C inside Brython #2296
• [FEATURE] Authorize top level await by default (equiv to python -m asyncio by default?) ? #2279
• Errors in brython.info test suites #2273
• Bests practices for Safe interactions between JS/Brython ? #2263
• Too much recursion in arrays #2262
• Array of Array not properly synchronized (JS => Brython) ! #2261
• Improve print() when printing HTMLElement #2255
• async/defer on brython.js : ModuleNotFoundError: No module named 'browser.webcomponent' #2252
• Creating async callbacks in Brython for JS function (need aio.create_task ?) #2251
• TypeError: obj is null when importing windows to globals() [Dangerous null/undefined/None conversions ?] #2248
• When doing inheritance : bases[0].$js_func is undefined #2247
• DOMStringMap should returns "None" instead of raising "AttributeError" when key does not exist #2245
• Direct inheritance of window.HTMLElement = bug, indirect inheritance = OK ? #2244
• webcomponent.define() is missing a third parameter #2239
• browser.template + webcomponent.define() = infinite loop #2236
• Documentation doesn't show how to customize built-in elements + attachShadow = bug on customized built-in elements #2234

[denis-migdal]

I moved the optimizations issues to [2260] and made a summary at the top of it.