suspect-devices/circuitpython/py/qstr.c, branch v1.6 CircuitPython - a Python implementation for teaching coding with microcontrollers https://git.suspectdevices.com/suspect-devices/circuitpython/atom?h=v1.6 2015-12-17T12:41:40+00:00 py/qstr: Use size_t instead of mp_uint_t when counting allocated bytes. 2015-12-17T12:41:40+00:00 Damien George damien.p.george@gmail.com 2015-12-17T12:41:40+00:00 urn:sha1:257848587fb03879e145a34c8065927cf4d1532f py: Change qstr_* functions to use size_t as the type for str len arg. 2015-11-29T14:25:04+00:00 Damien George damien.p.george@gmail.com 2015-11-27T12:23:18+00:00 urn:sha1:c3f64d9799cdf8af88087eebe6628e83d658405c py/qstr: Fix calc of qstr memory usage, due to new qstr chunk allocation. 2015-10-13T14:52:06+00:00 Damien George damien.p.george@gmail.com 2015-10-13T14:52:06+00:00 urn:sha1:59a41e8fcdb80c1ee025ba782c69a8077b214602 py: Make qstr hash size configurable, defaults to 2 bytes. 2015-07-20T11:03:13+00:00 Damien George damien.p.george@gmail.com 2015-07-20T11:03:13+00:00 urn:sha1:c3bd9415cc8e6ba3619fe4b7a2bdac20260b0236 This patch makes configurable, via MICROPY_QSTR_BYTES_IN_HASH, the number of bytes used for a qstr hash. It was originally fixed at 2 bytes, and now defaults to 2 bytes. Setting it to 1 byte will save ROM and RAM at a small expense of hash collisions. py: Improve allocation policy of qstr data. 2015-07-14T21:56:32+00:00 Damien George damien.p.george@gmail.com 2015-06-13T20:53:22+00:00 urn:sha1:ade9a052365247be5ed4ce8b53c2164a576a4a05 Previous to this patch all interned strings lived in their own malloc'd chunk. On average this wastes N/2 bytes per interned string, where N is the number-of-bytes for a quanta of the memory allocator (16 bytes on 32 bit archs). With this patch interned strings are concatenated into the same malloc'd chunk when possible. Such chunks are enlarged inplace when possible, and shrunk to fit when a new chunk is needed. RAM savings with this patch are highly varied, but should always show an improvement (unless only 3 or 4 strings are interned). New version typically uses about 70% of previous memory for the qstr data, and can lead to savings of around 10% of total memory footprint of a running script. Costs about 120 bytes code size on Thumb2 archs (depends on how many calls to gc_realloc are made). py: Convert occurrences of non-debug printf to mp_printf. 2015-04-16T14:30:16+00:00 Damien George damien.p.george@gmail.com 2015-04-11T11:15:47+00:00 urn:sha1:e72cda99fd5fc9e7c6476eb8574c4401d3ef9560 py: Add option to micropython.qstr_info() to dump actual qstrs. 2015-02-10T11:02:28+00:00 Damien George damien.p.george@gmail.com 2015-02-10T11:02:28+00:00 urn:sha1:ea0461dcd390135561651036f39606d50ce12999 py, unix: Allow to compile with -Wsign-compare. 2015-01-16T17:47:07+00:00 Damien George damien.p.george@gmail.com 2015-01-16T17:47:07+00:00 urn:sha1:963a5a3e82ded7ee75adae72ae7cb14796fa150e See issue #699. py: Never intern data of large string/bytes object; add relevant tests. 2015-01-13T16:21:23+00:00 Damien George damien.p.george@gmail.com 2015-01-13T16:21:23+00:00 urn:sha1:4c81ba8015238a343593468aa5173440fd392e32 Previously to this patch all constant string/bytes objects were interned by the compiler, and this lead to crashes when the qstr was too long (noticeable now that qstr length storage defaults to 1 byte). With this patch, long string/bytes objects are never interned, and are referenced directly as constant objects within generated code using load_const_obj. py: Add MICROPY_QSTR_BYTES_IN_LEN config option, defaulting to 1. 2015-01-11T22:27:30+00:00 Damien George damien.p.george@gmail.com 2015-01-11T22:27:30+00:00 urn:sha1:95836f8439b9f1ca0b6ff20f56a03253aa9ba836 This new config option sets how many fixed-number-of-bytes to use to store the length of each qstr. Previously this was hard coded to 2, but, as per issue #1056, this is considered overkill since no-one needs identifiers longer than 255 bytes. With this patch the number of bytes for the length is configurable, and defaults to 1 byte. The configuration option filters through to the makeqstrdata.py script. Code size savings going from 2 to 1 byte: - unix x64 down by 592 bytes - stmhal down by 1148 bytes - bare-arm down by 284 bytes Also has RAM savings, and will be slightly more efficient in execution.