lua/testes/nextvar.lua, branch v5.5.1

'__pairs' can also return a to-be-closed object

2025-11-11T18:11:06+00:00

Randomness added to table length computation

2025-07-18T19:18:30+00:00

A bad actor could fill only a few entries in a table (power of twos in decreasing order, see tests) and produce a small table with a huge length. If your program builds a table with external data and iterates over its length, this behavior could be an issue.

Variable attributes can prefix name list

2025-05-18T14:43:43+00:00

In this format, the attribute applies to all names in the list; e.g. "global print, require, math".

Collective declaration for globals ('global *')

2025-05-13T14:43:10+00:00

Details (typos in comments)

2025-04-23T14:36:09+00:00

Removed copyright notice from 'testes/all.lua'

2025-03-12T17:00:58+00:00

All test files refer to the main copyright notice in 'lua.h'.

New way to keep hints for table length

2024-11-29T20:26:20+00:00

Instead of using 'alimit' for keeping the size of the array and at the same time being a hint for '#t', a table now keeps these two values separate. The Table structure has a field 'asize' with the size of the array, while the length hint is kept in the array itself. That way, tables with no array part waste no space with that field. Moreover, the space for the hint may have zero cost for small arrays, if the array of tags plus the hint still fits in a single word.

Add extra size when resizing tables with deleted keys

2024-11-14T14:48:25+00:00

Without this extra space, sequences of insertions/deletions (and some other uses) can have unpexpected low performances. See the added tests for an example, and *Mathematical Models to Analyze Lua Hybrid Tables and Why They Need a Fix* (Martínez, Nicaud, Rotondo; arXiv:2208.13602v2) for detais.

New rule for size of array part

2024-11-13T16:37:24+00:00

Array part needs 1/3 of its elements filled, instead of 1/2. Array entries use ~1/3 the memory of hash entries, so this new rule still ensures that array parts do not use more memory than keeping the values in the hash, while allowing more uses of the array part, which is more efficient than the hash.

Table rehash can resize only the hash part

2024-10-28T13:54:36+00:00

If there are no integer keys outside the array part, there is no reason to resize it, saving the time to count its elements. Moreover, assignments to non-integer keys will not collapse a table created with 'table.create'.