CircuitPython - a Python implementation for teaching coding with microcontrollers https://git.suspectdevices.com/suspect-devices/circuitpython/atom?h=v1.9.2 2017-07-31T08:35:40+00:00 2017-07-31T08:35:40+00:00 Alexander Steffen devel.20.webmeister@spamgourmet.com 2017-06-30T07:22:17+00:00 urn:sha1:55f33240f3d7051d4213629e92437a36f1fac50e There were several different spellings of MicroPython present in comments, when there should be only one. 2017-07-07T01:47:38+00:00 Damien George damien.p.george@gmail.com 2017-07-07T01:47:38+00:00 urn:sha1:f69ab79ec8347c1f5ff0c6f31947ec06073fbd52 Adds nothing to the code size, since it uses existing empty slots in the type structures. 2017-06-09T03:36:33+00:00 Damien George damien.p.george@gmail.com 2017-06-09T03:31:57+00:00 urn:sha1:a8a5d1e8c8db3b7c64e1921005ceb5a5d47280f4 Taking the address of a local variable leads to increased stack usage, so the mp_decode_uint_skip() function is added to reduce the need for taking addresses. The changes in this patch reduce stack usage of a Python call by 8 bytes on ARM Thumb, by 16 bytes on non-windowing Xtensa archs, and by 16 bytes on x86-64. Code size is also slightly reduced on most archs by around 32 bytes. 2017-03-28T11:37:26+00:00 Damien George damien.p.george@gmail.com 2017-03-28T11:37:26+00:00 urn:sha1:94c41bb06f6482ece0717c5bd63266b8da063caa Saves 168 bytes on bare-arm. 2017-03-17T05:50:19+00:00 Damien George damien.p.george@gmail.com 2017-03-17T05:38:46+00:00 urn:sha1:5640e6dacd39d97adffce8490991c457f457b1cd This has a noticeable improvement on x86-64 and Thumb2 archs, where stack usage is reduced by 2 machine words in the VM. 2017-03-17T05:39:13+00:00 Damien George damien.p.george@gmail.com 2017-03-17T03:54:53+00:00 urn:sha1:71a3d6ec3bd02c5bd13334537e1bd146bb643bad Instead of caching data that is constant (code_info, const_table and n_state), store just a pointer to the underlying function object from which this data can be derived. This helps reduce stack usage for the case when the mp_code_state_t structure is stored on the stack, as well as heap usage when it's stored on the heap. The downside is that the VM becomes a little more complex because it now needs to derive the data from the underlying function object. But this doesn't impact the performance by much (if at all) because most of the decoding of data is done outside the main opcode loop. Measurements using pystone show that little to no performance is lost. This patch also fixes a nasty bug whereby the bytecode can be reclaimed by the GC during execution. With this patch there is always a pointer to the function object held by the VM during execution, since it's stored in the mp_code_state_t structure. 2017-02-16T07:38:06+00:00 Damien George damien.p.george@gmail.com 2016-01-09T23:14:54+00:00 urn:sha1:ae8d86758631e62466a55d179897d2111c3cb1c1 Allows to iterate over the following without allocating on the heap: - tuple - list - string, bytes - bytearray, array - dict (not dict.keys, dict.values, dict.items) - set, frozenset Allows to call the following without heap memory: - all, any, min, max, sum TODO: still need to allocate stack memory in bytecode for iter_buf. 2017-01-16T13:16:56+00:00 Damien George damien.p.george@gmail.com 2017-01-16T13:16:56+00:00 urn:sha1:239f92029910cddb08a2669f3ebcd987f0a2d0a8 In this case it's allowed to be ignored. 2017-01-16T13:14:14+00:00 Damien George damien.p.george@gmail.com 2017-01-16T13:14:14+00:00 urn:sha1:681994638bfda0fba5f36f8a4148628792f698f9 Arguments to throw() for generators don't need to be exceptions. 2016-10-17T01:17:37+00:00 Damien George damien.p.george@gmail.com 2016-10-17T01:17:37+00:00 urn:sha1:7d0d7215d2575a2d36d34c9a13b58cade0610a28 Saves the following number of bytes of code space: 176 for bare-arm, 352 for minimal, 272 for unix x86-64, 140 for stmhal, 120 for esp8266.