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check unexpected high bits for invalid characters#173

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dcousens merged 3 commits into
masterfrom
chk
Feb 1, 2018
Merged

check unexpected high bits for invalid characters#173
dcousens merged 3 commits into
masterfrom
chk

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@dcousens

@dcousens dcousens commented Nov 30, 2017 •
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10% performance drop, but 200% better debuggability.

Hopefully this resolves that problem @indutny

@dcousens

dcousens commented Nov 30, 2017 •
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passes tests now

dcousens referenced this pull request Nov 30, 2017
@indutny
lib: better validation of string input
e924509 
Fix: #151
indutny
indutny reviewed Nov 30, 2017
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Comment thread test/constructor-test.js
'0000gg00',
'ffffggff',
'ffffggff',
'hexadecimal'

@indutny indutny Nov 30, 2017

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Let's add ., -, /. They all come before 0 in ASCII.

@dcousens dcousens Nov 30, 2017

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@indutny added, and it passes!

@indutny

indutny commented Dec 2, 2017

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Sorry for delay. I just benchmarked it, and don't see any significant performance improvement. Do you see it on your side?

Benchmarks can be run with:

SELF_ONLY=1 node benchmarks/index.js create

@dcousens

dcousens commented Dec 4, 2017 •
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I measured an average 5-10% improvement... but [assumedly] the GC totally throws it off, and I often measure +/-20% swings for both depending on their order in the benchmark stack.

@fanatid

fanatid commented Dec 5, 2017 •
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node version: v9.2.0

master:

Seed: 82910582182c79d7d4d9592e15d53f0d
Benchmarking: create-10
bn.js#create-10 x 376,678 ops/sec ±1.55% (9 runs sampled)
------------------------
Fastest is bn.js#create-10
========================
Benchmarking: create-hex
bn.js#create-hex x 478,025 ops/sec ±1.02% (9 runs sampled)
------------------------
Fastest is bn.js#create-hex
========================

PR:

Seed: 82910582182c79d7d4d9592e15d53f0d
Benchmarking: create-10
bn.js#create-10 x 383,537 ops/sec ±0.90% (9 runs sampled)
------------------------
Fastest is bn.js#create-10
========================
Benchmarking: create-hex
bn.js#create-hex x 489,839 ops/sec ±0.37% (9 runs sampled)
------------------------
Fastest is bn.js#create-hex
========================

@dcousens

dcousens commented Dec 5, 2017

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@fanatid how did you get consistent results :P

@fanatid

fanatid commented Dec 5, 2017

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Sorry, was run with different seed, numbers updated.

@dcousens

dcousens commented Feb 1, 2018 •
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@indutny good to merge? If not, I'll simply add the test?

indutny
indutny approved these changes Feb 1, 2018
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LGTM, sorry for delay.

@dcousens dcousens merged commit 98ac84e into master Feb 1, 2018
@dcousens dcousens deleted the chk branch February 1, 2018 22:15
@exoego exoego mentioned this pull request Sep 11, 2019
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@fanatid fanatid mentioned this pull request Dec 23, 2019
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@meck93 meck93 mentioned this pull request Jan 24, 2020
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@dcousens @indutny @fanatid