2020-09-07 00:53:08 +08:00
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Misc:
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- use custom printf to avoid C library compatibility issues
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- rename CONFIG_ALL_UNICODE, CONFIG_BIGNUM, CONFIG_ATOMICS, CONFIG_CHECK_JSVALUE ?
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- unify coding style and naming conventions
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- use names from the ECMA spec in library implementation
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- modules: if no ".", use a well known module loading path ?
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- use JSHoistedDef only for global variables (JSHoistedDef.var_name != JS_ATOM_NULL)
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- add index in JSVarDef and is_arg flag to merge args and vars in JSFunctionDef
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- replace most JSVarDef flags with var_type enumeration
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- use byte code emitters with typed arguments (for clarity)
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- use 2 bytecode DynBufs in JSFunctionDef, one for reading, one for writing
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and use the same wrappers in all phases
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- use more generic method for line numbers in resolve_variables and resolve_labels
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- use custom timezone support to avoid C library compatibility issues
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Memory:
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- test border cases for max number of atoms, object properties, string length
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- add emergency malloc mode for out of memory exceptions.
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- test all DynBuf memory errors
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- test all js_realloc memory errors
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- bignum: handle memory errors
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- use memory pools for objects, etc?
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- improve JS_ComputeMemoryUsage() with more info
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Optimizations:
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- 64-bit atoms in 64-bit mode ?
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- use auto-init properties for more global objects
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- reuse stack slots for disjoint scopes, if strip
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- optimize `for of` iterator for built-in array objects
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- add heuristic to avoid some cycles in closures
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- small String (0-2 charcodes) with immediate storage
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- perform static string concatenation at compile time
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- optimize string concatenation with ropes or miniropes?
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- add implicit numeric strings for Uint32 numbers?
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- optimize `s += a + b`, `s += a.b` and similar simple expressions
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- ensure string canonical representation and optimise comparisons and hashes?
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- remove JSObject.first_weak_ref, use bit+context based hashed array for weak references
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- optimize function storage with length and name accessors?
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- property access optimization on the global object, functions,
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prototypes and special non extensible objects.
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- create object literals with the correct length by backpatching length argument
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- remove redundant set_loc_uninitialized/check_uninitialized opcodes
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- peephole optim: push_atom_value, to_propkey -> push_atom_value
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- peephole optim: put_loc x, get_loc_check x -> set_loc x
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- comparative performance benchmark
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- use variable name when throwing uninitialized exception if available
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- convert slow array to fast array when all properties != length are numeric
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- optimize destructuring assignments for global and local variables
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- implement some form of tail-call-optimization
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- optimize OP_apply
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- optimize f(...b)
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Extensions:
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- support more features in [features] section
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- add built-in preprocessor in compiler, get rid of jscompress
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handle #if, #ifdef, #line, limited support for #define
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- get rid of __loadScript, use more common name
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- BSD sockets
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- Workers
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REPL:
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- debugger
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- readline: support MS Windows terminal
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- readline: handle dynamic terminal resizing
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- multiline editing
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- runtime object and function inspectors
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- interactive object browser
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- use more generic approach to display evaluation results
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- improve directive handling: dispatch, colorize, completion...
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- save history
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- close all predefined methods in repl.js and jscalc.js
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Test262o: 0/11262 errors, 463 excluded
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Test262o commit: 7da91bceb9ce7613f87db47ddd1292a2dda58b42 (es5-tests branch)
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2020-09-07 01:02:03 +08:00
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Test262: 22/70040 errors, 860 excluded, 581 skipped
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test262 commit: 25c9e334d301944537215caba1d7f44319f3e0da
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