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Unify internal property creation #4373

Merged
merged 1 commit into from
Jan 12, 2021
Merged

Unify internal property creation #4373

merged 1 commit into from
Jan 12, 2021

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zherczeg
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@zherczeg zherczeg force-pushed the internal_prop branch 5 times, most recently from fb920ee to c9b1655 Compare December 28, 2020 17:12
@zherczeg zherczeg mentioned this pull request Dec 29, 2020
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lygstate
lygstate reviewed Dec 31, 2020
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jerry-core/ecma/base/ecma-globals.h
/**
* Checks whether a property is raw data or accessor property
*/
#define ECMA_PROPERTY_IS_RAW(property) \
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@lygstate lygstate Dec 31, 2020 •
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I like something like (property & 0b00011000), C doesn't support for 0b, we can use 0x instead.
Without the need of compare operator
Any definition of property bits?
property is 8 bits long, what's the meaning of each bits?

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Good bit magic is essential for high performance. This condition checks that the highest two bits are not set without using a temporary register. The alternative ´(x & 0xc0) != 0xc0´ requires two operations and a temporary register.
Property bits are described in ecma_property_flags_t.

@zherczeg zherczeg force-pushed the internal_prop branch 2 times, most recently from bd99a33 to b071da6 Compare January 7, 2021 10:11
rerobika
rerobika approved these changes Jan 7, 2021
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LGTM

@LaszloLango
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Property creation and usage are hot paths in the engine. Does this patch have any effect on the performance?

LaszloLango
LaszloLango requested changes Jan 11, 2021
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Please update ./docs/04.INTERNALS.md as well.

@zherczeg
Unify internal property creation
136fa18 
Furthermore free up a bit in the property descriptor.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
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Benchmark Heap (bytes) Stack (bytes) Perf (sec)
3d-cube.js 10992 -> 10992 : 0.000% 14232 -> 14232 : 0.000% 1.132 -> 1.122 : +0.850%
3d-morph.js 289232 -> 289232 : 0.000% 1704 -> 1704 : 0.000% 1.318 -> 1.324 : -0.449%
3d-raytrace.js 117656 -> 117656 : 0.000% 2596 -> 2596 : 0.000% 1.326 -> 1.320 : +0.525%
access-binary-trees.js 27120 -> 27120 : 0.000% 3512 -> 3512 : 0.000% 0.778 -> 0.790 : -1.574%
access-fannkuch.js 1792 -> 1792 : 0.000% 1776 -> 1776 : 0.000% 2.546 -> 2.555 : -0.354%
access-nbody.js 4600 -> 4600 : 0.000% 1864 -> 1864 : 0.000% 1.519 -> 1.521 : -0.119%
bitops-3bit-bits-in-byte.js 1024 -> 1024 : 0.000% 1720 -> 1720 : 0.000% 0.703 -> 0.701 : +0.291%
bitops-bits-in-byte.js 984 -> 984 : 0.000% 1720 -> 1720 : 0.000% 1.015 -> 1.013 : +0.247%
bitops-bitwise-and.js 752 -> 752 : 0.000% 1472 -> 1472 : 0.000% 1.251 -> 1.238 : +1.060%
bitops-nsieve-bits.js 61184 -> 61184 : 0.000% 1720 -> 1720 : 0.000% 1.477 -> 1.476 : +0.094%
controlflow-recursive.js 1288 -> 1288 : 0.000% 63624 -> 63624 : 0.000% 0.520 -> 0.523 : -0.458%
crypto-aes.js 28040 -> 28040 : 0.000% 2312 -> 2312 : 0.000% 0.884 -> 0.887 : -0.367%
crypto-md5.js 70968 -> 70968 : 0.000% 1788 -> 1788 : 0.000% 0.742 -> 0.742 : +0.104%
crypto-sha1.js 46328 -> 46328 : 0.000% 1848 -> 1848 : 0.000% 0.764 -> 0.758 : +0.707%
crypto.js 51704 -> 51704 : 0.000% 3228 -> 3228 : 0.000% 8.684 -> 8.657 : +0.307%
date-format-tofte.js 8952 -> 8952 : 0.000% 2120 -> 2120 : 0.000% 1.012 -> 1.004 : +0.760%
date-format-xparb.js 15144 -> 15144 : 0.000% 2704 -> 2704 : 0.000% 0.820 -> 0.813 : +0.854%
deltablue.js 455544 -> 455544 : 0.000% 3636 -> 3636 : 0.000% 5.487 -> 5.465 : +0.403%
math-cordic.js 2048 -> 2048 : 0.000% 1720 -> 1720 : 0.000% 1.711 -> 1.709 : +0.098%
math-partial-sums.js 1512 -> 1512 : 0.000% 1696 -> 1696 : 0.000% 1.154 -> 1.156 : -0.144%
math-spectral-norm.js 3264 -> 3264 : 0.000% 1720 -> 1720 : 0.000% 0.739 -> 0.739 : +0.073%
raytrace.js 22424 -> 22424 : 0.000% 5104 -> 5104 : 0.000% 2.774 -> 2.791 : -0.597%
richards.js 8568 -> 8568 : 0.000% 2196 -> 2196 : 0.000% 0.314 -> 0.314 : +0.093%
string-base64.js 90104 -> 90104 : 0.000% 1768 -> 1768 : 0.000% 1.434 -> 1.420 : +1.038%
string-fasta.js 4400 -> 4400 : 0.000% 1704 -> 1704 : 0.000% 3.420 -> 3.425 : -0.133%
Geometric mean: 0.000% 0.000% +0.134%
Binary (bytes) master(99ec5b9) patch(136fa18) Diff
size 226976 226976 0 bytes
.rodata 20003 20003 0 bytes
.dynstr 448 448 0 bytes
.rel.plt 456 456 0 bytes
.interp 25 25 0 bytes
.dynsym 1008 1008 0 bytes
.gnu.hash 464 464 0 bytes
.text 198352 198312 -40 bytes
.comment 85 85 0 bytes
.shstrtab 226 226 0 bytes
.data 8 8 0 bytes
.ARM.exidx 8 8 0 bytes
.rel.dyn 16 16 0 bytes
.init 12 12 0 bytes
.got 244 244 0 bytes
.plt 716 716 0 bytes
.note.ABI-tag 32 32 0 bytes
.gnu.version_r 64 64 0 bytes
.bss 1575088 1575088 0 bytes
.fini 8 8 0 bytes
.hash 408 408 0 bytes
.gnu.version 126 126 0 bytes
.fini_array 4 4 0 bytes
.init_array 4 4 0 bytes
.dynamic 248 248 0 bytes
.eh_frame 4 4 0 bytes
.ARM.attributes 53 53 0 bytes

No major effect.

LaszloLango
LaszloLango approved these changes Jan 12, 2021
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LGTM

@zherczeg zherczeg merged commit 6f0391d into jerryscript-project:master Jan 12, 2021
@zherczeg zherczeg deleted the internal_prop branch January 12, 2021 12:12
ossy-szeged
ossy-szeged reviewed Jan 12, 2021
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jerry-core/ecma/operations/ecma-objects.c
Comment on lines +2418 to +2421
/* Internal properties are special properties so they must not be present. */
JERRY_ASSERT (ECMA_PROPERTY_GET_NAME_TYPE (*property_p) != ECMA_DIRECT_STRING_MAGIC
|| prop_pair_p->names_cp[i] < LIT_NON_INTERNAL_MAGIC_STRING__COUNT
|| prop_pair_p->names_cp[i] >= LIT_MAGIC_STRING__COUNT);
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This assert hits on debug test262-esnext on 116 tests. Please a take a look what happened here.

@ossy-szeged ossy-szeged mentioned this pull request Jan 12, 2021
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@LaszloLango LaszloLango LaszloLango approved these changes

@rerobika rerobika rerobika approved these changes

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@zherczeg @LaszloLango @lygstate @ossy-szeged @rerobika