remove hasOwnProperty call #183

gurgunday · 2024-10-08T05:35:33Z

Since the object no longer has a prototype chain, we can just check if a key exists by accessing it

blakeembrey · 2024-10-08T05:55:30Z

src/index.ts

@@ -121,7 +120,7 @@ export function parse(
    const key = str.slice(keyStartIdx, keyEndIdx);

    // only assign once
-    if (!__hasOwnProperty.call(obj, key)) {
+    if (obj[key] === undefined) {


Can you double check performance? I didn’t change this because my numbers were worse doing the undefined check.

Sure, let me bench it

Bench LGTM, would you be free to rebase on main and remove the if (value !== undefined) now? Since it won't matter if dec returns undefined from #179.

gurgunday · 2024-10-08T16:56:31Z

On my Linux machine (CPU 12th Gen Intel(R) Core(TM) i9-12900H)

New:

 ✓ src/parse.bench.ts (26) 39576ms
   ✓ parse (6) 7940ms
     name                   hz     min     max    mean     p75     p99    p995    p999     rme  samples
   · simple       9,702,920.99  0.0001  0.2114  0.0001  0.0001  0.0001  0.0002  0.0003  ±0.25%  4851461   fastest
   · decode       4,651,623.54  0.0002  0.0680  0.0002  0.0002  0.0002  0.0003  0.0008  ±0.12%  2325812
   · unquote      9,406,398.95  0.0001  0.7161  0.0001  0.0001  0.0001  0.0002  0.0003  ±0.31%  4703200
   · duplicates   1,929,250.28  0.0004  0.2137  0.0005  0.0005  0.0006  0.0007  0.0015  ±0.15%   964626
   · 10 cookies     827,978.72  0.0010  0.4642  0.0012  0.0012  0.0019  0.0024  0.0081  ±0.67%   413990
   · 100 cookies     66,803.29  0.0128  0.5871  0.0150  0.0146  0.0230  0.0285  0.2132  ±0.75%    33402   slowest
   ✓ parse top-sites (20) 31633ms
     name                                  hz     min     max    mean     p75     p99    p995    p999     rme   samples
   · parse accounts.google.com   7,581,630.32  0.0001  0.0834  0.0001  0.0001  0.0002  0.0002  0.0004  ±0.13%   3790816
   · parse amazon.com            2,568,358.75  0.0003  0.5899  0.0004  0.0004  0.0005  0.0006  0.0011  ±0.59%   1284180
   · parse apple.com             7,825,036.53  0.0001  1.4933  0.0001  0.0001  0.0002  0.0003  0.0013  ±0.63%   3912519
   · parse cloudflare.com        7,231,698.58  0.0001  0.3224  0.0001  0.0001  0.0002  0.0003  0.0009  ±0.61%   3615850
   · parse docs.google.com       7,349,305.38  0.0001  0.1290  0.0001  0.0001  0.0002  0.0002  0.0003  ±0.14%   3674653
   · parse drive.google.com      7,018,752.67  0.0001  0.2117  0.0001  0.0001  0.0002  0.0002  0.0003  ±0.17%   3509377
   · parse en.wikipedia.org      2,102,850.00  0.0004  0.0437  0.0005  0.0005  0.0005  0.0006  0.0010  ±0.07%   1051425
   · parse istockphoto.com         536,774.79  0.0015  0.6531  0.0019  0.0019  0.0022  0.0025  0.0112  ±0.73%    268388   slowest
   · parse maps.google.com       7,355,024.25  0.0001  4.1665  0.0001  0.0001  0.0002  0.0002  0.0006  ±1.77%   3677513
   · parse play.google.com       7,561,780.41  0.0001  0.5561  0.0001  0.0001  0.0002  0.0002  0.0005  ±0.60%   3780891
   · parse policies.google.com   7,608,549.95  0.0001  0.5061  0.0001  0.0001  0.0002  0.0002  0.0005  ±0.77%   3804275
   · parse pt.wikipedia.org      2,670,298.36  0.0003  0.0561  0.0004  0.0004  0.0004  0.0005  0.0010  ±0.12%   1335150
   · parse sites.google.com      7,172,833.14  0.0001  0.2123  0.0001  0.0001  0.0002  0.0002  0.0007  ±0.15%   3586417
   · parse support.google.com    4,458,951.07  0.0002  0.7200  0.0002  0.0002  0.0003  0.0003  0.0008  ±0.97%   2229476
   · parse t.me                  7,294,171.24  0.0001  0.9658  0.0001  0.0001  0.0002  0.0002  0.0003  ±0.42%   3647086
   · parse vk.com                  853,759.58  0.0010  0.3518  0.0012  0.0012  0.0013  0.0017  0.0041  ±0.52%    426964
   · parse www.google.com        4,583,636.97  0.0002  0.5562  0.0002  0.0002  0.0003  0.0003  0.0007  ±0.55%   2291819
   · parse youtu.be              1,877,702.66  0.0005  0.2178  0.0005  0.0005  0.0006  0.0006  0.0014  ±0.16%    938852
   · parse youtube.com           1,901,106.15  0.0005  0.2301  0.0005  0.0005  0.0006  0.0006  0.0012  ±0.16%    950554
   · parse example.com          22,561,632.11  0.0000  0.2071  0.0000  0.0000  0.0001  0.0001  0.0001  ±0.17%  11280817   fastest

Old (master / 0f56c6e):

 ✓ src/parse.bench.ts (26) 40091ms
   ✓ parse (6) 7787ms
     name                   hz     min     max    mean     p75     p99    p995    p999     rme  samples
   · simple       8,727,527.23  0.0001  1.0084  0.0001  0.0001  0.0001  0.0002  0.0003  ±0.57%  4363764   fastest
   · decode       4,127,381.38  0.0002  0.0453  0.0002  0.0002  0.0003  0.0004  0.0005  ±0.11%  2063691
   · unquote      8,228,980.06  0.0001  0.2382  0.0001  0.0001  0.0001  0.0002  0.0003  ±0.20%  4114491
   · duplicates   2,007,016.13  0.0004  1.5755  0.0005  0.0005  0.0006  0.0007  0.0022  ±0.76%  1003509
   · 10 cookies     868,530.59  0.0010  0.6681  0.0012  0.0011  0.0014  0.0017  0.0066  ±0.47%   434266
   · 100 cookies     68,317.46  0.0124  1.4316  0.0146  0.0142  0.0251  0.0383  0.1045  ±0.68%    34159   slowest
   ✓ parse top-sites (20) 32303ms
     name                                  hz     min     max    mean     p75     p99    p995    p999     rme   samples
   · parse accounts.google.com   7,279,393.53  0.0001  0.0678  0.0001  0.0001  0.0002  0.0002  0.0003  ±0.15%   3639697
   · parse amazon.com            2,534,713.80  0.0003  0.3295  0.0004  0.0004  0.0005  0.0006  0.0011  ±0.40%   1267357
   · parse apple.com             8,430,491.56  0.0001  0.0868  0.0001  0.0001  0.0002  0.0002  0.0003  ±0.13%   4215246
   · parse cloudflare.com        8,000,964.86  0.0001  3.6636  0.0001  0.0001  0.0001  0.0002  0.0005  ±1.55%   4000483
   · parse docs.google.com       7,647,191.59  0.0001  0.2127  0.0001  0.0001  0.0002  0.0002  0.0003  ±0.15%   3823596
   · parse drive.google.com      7,698,992.83  0.0001  0.0532  0.0001  0.0001  0.0002  0.0002  0.0003  ±0.14%   3849497
   · parse en.wikipedia.org      2,146,053.02  0.0004  0.5728  0.0005  0.0005  0.0006  0.0006  0.0010  ±0.35%   1073027
   · parse istockphoto.com         550,595.79  0.0015  0.6311  0.0018  0.0018  0.0027  0.0030  0.0102  ±0.88%    275298   slowest
   · parse maps.google.com       7,597,900.78  0.0001  5.0688  0.0001  0.0001  0.0002  0.0003  0.0006  ±2.12%   3798951
   · parse play.google.com       8,055,075.47  0.0001  0.7307  0.0001  0.0001  0.0002  0.0002  0.0008  ±0.66%   4027538
   · parse policies.google.com   7,681,858.95  0.0001  0.4727  0.0001  0.0001  0.0002  0.0002  0.0005  ±0.82%   3840933
   · parse pt.wikipedia.org      2,568,763.73  0.0003  0.4443  0.0004  0.0004  0.0006  0.0007  0.0009  ±0.21%   1284382
   · parse sites.google.com      7,427,749.51  0.0001  0.2212  0.0001  0.0001  0.0002  0.0002  0.0003  ±0.14%   3713875
   · parse support.google.com    4,725,513.75  0.0002  0.6865  0.0002  0.0002  0.0003  0.0003  0.0008  ±1.12%   2362757
   · parse t.me                  7,036,034.16  0.0001  0.9734  0.0001  0.0001  0.0002  0.0002  0.0009  ±0.43%   3518018
   · parse vk.com                  900,729.42  0.0010  0.3716  0.0011  0.0011  0.0013  0.0017  0.0053  ±0.51%    450365
   · parse www.google.com        4,584,557.85  0.0002  0.5046  0.0002  0.0002  0.0003  0.0003  0.0006  ±0.74%   2292279
   · parse youtu.be              1,931,114.60  0.0004  0.2125  0.0005  0.0005  0.0006  0.0006  0.0016  ±0.17%    965558
   · parse youtube.com           1,945,369.56  0.0005  0.2069  0.0005  0.0005  0.0006  0.0006  0.0014  ±0.14%    972685
   · parse example.com          22,165,850.27  0.0000  0.2121  0.0000  0.0000  0.0001  0.0001  0.0001  ±0.19%  11082926   fastest

NewEraCracker · 2024-10-08T17:35:09Z

I strongly recommend against this change.

https://stackoverflow.com/a/46425266 &
https://stackoverflow.com/a/12017703

Please keep the __hasOwnProperty proper check which you introduced with version 0.7.2

Otherwise I will be forced to create another patch-package patch to revert this insecure change back to the secure code.

Thank you.

blakeembrey · 2024-10-08T17:38:19Z

@NewEraCracker I think you misunderstand this change. It used to be an undefined check in 0.6 and this is also a null prototype now.

gurgunday · 2024-10-08T17:46:24Z

@NewEraCracker the object in question doesn't have a prototype chain

cookie/src/index.ts

Line 98 in 0f56c6e

const obj: Record<string, string> = new NullObject();

src/index.ts

blakeembrey · 2024-10-08T21:46:22Z

Before:

     name                   hz     min     max    mean     p75     p99    p995    p999     rme  samples
   · simple       9,536,666.74  0.0000  1.9262  0.0001  0.0001  0.0001  0.0002  0.0003  ±1.15%  4768334   fastest
   · decode       4,351,025.10  0.0001  0.1439  0.0002  0.0003  0.0003  0.0003  0.0004  ±0.11%  2175513
   · unquote      8,798,691.91  0.0000  3.5239  0.0001  0.0001  0.0002  0.0002  0.0003  ±1.60%  4399346
   · duplicates   1,870,817.76  0.0004  0.1379  0.0005  0.0005  0.0007  0.0008  0.0025  ±0.11%   935409
   · 10 cookies     725,326.87  0.0012  0.2622  0.0014  0.0014  0.0016  0.0018  0.0047  ±0.43%   362664
   · 100 cookies     64,256.19  0.0141  0.2938  0.0156  0.0153  0.0211  0.0258  0.1795  ±0.55%    32129   slowest
   ✓ parse top-sites (20) 30438ms
     name                                  hz     min     max    mean     p75     p99    p995    p999     rme   samples
   · parse accounts.google.com   7,973,679.12  0.0000  3.5668  0.0001  0.0001  0.0002  0.0002  0.0003  ±1.40%   3986840
   · parse amazon.com            2,524,065.60  0.0002  2.8802  0.0004  0.0004  0.0005  0.0005  0.0010  ±1.17%   1262033
   · parse apple.com             8,738,064.27  0.0000  0.2993  0.0001  0.0001  0.0001  0.0002  0.0003  ±0.78%   4369033
   · parse cloudflare.com        7,969,211.55  0.0000  0.4134  0.0001  0.0001  0.0002  0.0002  0.0004  ±0.76%   3984606
   · parse docs.google.com       8,069,740.05  0.0000  0.0374  0.0001  0.0001  0.0002  0.0002  0.0003  ±0.07%   4034871
   · parse drive.google.com      7,891,565.75  0.0000  0.0435  0.0001  0.0001  0.0002  0.0002  0.0003  ±0.07%   3945783
   · parse en.wikipedia.org      2,029,437.43  0.0004  0.3934  0.0005  0.0005  0.0006  0.0007  0.0008  ±0.24%   1014719
   · parse istockphoto.com         411,196.45  0.0022  0.5065  0.0024  0.0024  0.0028  0.0031  0.0075  ±0.71%    205599   slowest
   · parse maps.google.com       7,976,809.60  0.0000  0.6668  0.0001  0.0001  0.0002  0.0002  0.0004  ±0.90%   3988405
   · parse play.google.com       7,898,624.74  0.0000  0.4017  0.0001  0.0001  0.0002  0.0002  0.0005  ±0.79%   3949313
   · parse policies.google.com   7,843,192.89  0.0000  0.4424  0.0001  0.0001  0.0002  0.0002  0.0005  ±1.01%   3921597
   · parse pt.wikipedia.org      2,416,569.74  0.0003  0.0569  0.0004  0.0004  0.0005  0.0005  0.0006  ±0.08%   1208285
   · parse sites.google.com      7,973,319.04  0.0000  0.0571  0.0001  0.0001  0.0002  0.0002  0.0003  ±0.08%   3986660
   · parse support.google.com    4,496,789.40  0.0001  0.6247  0.0002  0.0002  0.0003  0.0003  0.0006  ±1.28%   2248395
   · parse t.me                  7,887,270.60  0.0000  2.3432  0.0001  0.0001  0.0002  0.0002  0.0003  ±0.92%   3943636
   · parse vk.com                  856,894.20  0.0010  0.3931  0.0012  0.0012  0.0014  0.0015  0.0044  ±0.54%    428448
   · parse www.google.com        4,694,536.25  0.0001  0.4127  0.0002  0.0002  0.0003  0.0003  0.0005  ±0.67%   2347269
   · parse youtu.be              1,806,772.16  0.0004  0.0569  0.0006  0.0005  0.0007  0.0007  0.0008  ±0.08%    903389
   · parse youtube.com           1,713,205.32  0.0004  0.0720  0.0006  0.0006  0.0007  0.0008  0.0010  ±0.10%    856603
   · parse example.com          21,520,975.05  0.0000  0.0454  0.0000  0.0000  0.0001  0.0001  0.0001  ±0.07%  10760488   fastest

After:

     name                   hz     min     max    mean     p75     p99    p995    p999     rme  samples
   · simple       9,375,902.65  0.0000  2.1365  0.0001  0.0001  0.0001  0.0002  0.0003  ±1.26%  4687952   fastest
   · decode       4,361,141.90  0.0001  0.0906  0.0002  0.0003  0.0003  0.0003  0.0004  ±0.09%  2180571
   · unquote      9,053,984.48  0.0000  0.3696  0.0001  0.0001  0.0002  0.0002  0.0003  ±0.50%  4526993
   · duplicates   1,899,611.85  0.0004  0.2430  0.0005  0.0005  0.0007  0.0007  0.0008  ±0.16%   949806
   · 10 cookies     733,253.49  0.0011  0.4528  0.0014  0.0013  0.0017  0.0019  0.0058  ±0.78%   366627
   · 100 cookies     67,354.93  0.0131  0.4508  0.0148  0.0144  0.0203  0.0268  0.3113  ±0.92%    33678   slowest
   ✓ parse top-sites (20) 30506ms
     name                                  hz     min     max    mean     p75     p99    p995    p999     rme   samples
   · parse accounts.google.com   8,168,533.30  0.0000  0.3649  0.0001  0.0001  0.0002  0.0002  0.0003  ±0.16%   4084267
   · parse amazon.com            2,504,860.65  0.0003  0.5039  0.0004  0.0004  0.0005  0.0005  0.0010  ±0.72%   1252431
   · parse apple.com             8,366,634.68  0.0000  0.7055  0.0001  0.0001  0.0002  0.0002  0.0003  ±1.40%   4183318
   · parse cloudflare.com        7,707,217.48  0.0000  0.3580  0.0001  0.0001  0.0002  0.0002  0.0005  ±0.76%   3853609
   · parse docs.google.com       8,066,836.08  0.0000  0.0425  0.0001  0.0001  0.0002  0.0002  0.0003  ±0.08%   4033419
   · parse drive.google.com      8,190,201.41  0.0000  0.0496  0.0001  0.0001  0.0002  0.0002  0.0003  ±0.08%   4095101
   · parse en.wikipedia.org      2,032,568.20  0.0004  0.4090  0.0005  0.0005  0.0006  0.0006  0.0008  ±0.34%   1016285
   · parse istockphoto.com         401,386.78  0.0022  0.5097  0.0025  0.0025  0.0028  0.0032  0.0085  ±0.69%    200694   slowest
   · parse maps.google.com       7,883,794.32  0.0000  0.4968  0.0001  0.0001  0.0002  0.0002  0.0005  ±0.92%   3941919
   · parse play.google.com       7,938,028.54  0.0000  0.3647  0.0001  0.0001  0.0002  0.0002  0.0004  ±0.70%   3969015
   · parse policies.google.com   7,803,352.49  0.0000  0.4558  0.0001  0.0001  0.0002  0.0002  0.0005  ±1.04%   3901677
   · parse pt.wikipedia.org      2,416,136.80  0.0003  0.0569  0.0004  0.0004  0.0005  0.0005  0.0006  ±0.12%   1208069
   · parse sites.google.com      8,140,285.53  0.0000  0.1084  0.0001  0.0001  0.0002  0.0002  0.0003  ±0.08%   4070143
   · parse support.google.com    4,467,599.83  0.0001  9.2805  0.0002  0.0002  0.0003  0.0003  0.0006  ±3.84%   2233800
   · parse t.me                  8,063,400.15  0.0000  2.9553  0.0001  0.0001  0.0002  0.0002  0.0003  ±1.16%   4031701
   · parse vk.com                  838,286.50  0.0010  2.7789  0.0012  0.0012  0.0014  0.0016  0.0048  ±1.13%    419144
   · parse www.google.com        4,756,138.03  0.0001  1.8527  0.0002  0.0002  0.0003  0.0003  0.0005  ±0.98%   2378171
   · parse youtu.be              1,851,767.07  0.0004  0.3175  0.0005  0.0005  0.0006  0.0007  0.0008  ±0.16%    925884
   · parse youtube.com           1,851,129.30  0.0004  0.3191  0.0005  0.0005  0.0007  0.0007  0.0008  ±0.15%    925565
   · parse example.com          21,308,312.47  0.0000  0.0374  0.0000  0.0000  0.0001  0.0001  0.0001  ±0.08%  10654157   fastest

It still appears indifferent for me using node v22.9.0. I also found this site: https://andrew.hedges.name/experiments/in/. It seems like hasOwnProperty is faster for me on Safari and slower on Chrome 🤷 Maybe it's our different node/v8 versions?

Edit: Either way I'm good with using undefined, just wanted to update the benchmarks I have.

gurgunday · 2024-10-08T22:10:38Z

I mean, in theory, === undefined also checks the prototype chain if a key is not found on the object itself, but the object has no proto anyway

The === undefined check has a specific bytecode in V8, so I'd expect it to run faster than a function call, but honestly V8 might be doing anything at this level

blakeembrey reviewed Oct 8, 2024

View reviewed changes

remove hasownproperty call

44f6e63

gurgunday force-pushed the remove-hasown branch from daeae56 to 44f6e63 Compare October 8, 2024 18:58

remove undefined check

dfa910c

blakeembrey reviewed Oct 8, 2024

View reviewed changes

src/index.ts Outdated Show resolved Hide resolved

blakeembrey added 2 commits October 8, 2024 12:08

Allow undefined in type

90dd8e0

Update parse return type

a56d27f

blakeembrey merged commit 8f3ee9e into jshttp:master Oct 8, 2024
2 of 5 checks passed

gurgunday deleted the remove-hasown branch October 8, 2024 19:13

thetutlage mentioned this pull request Nov 4, 2024

[Snyk] Upgrade cookie from 0.7.2 to 1.0.1 poppinss/youch#55

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DanielRivers mentioned this pull request Nov 6, 2024

[Snyk] Upgrade cookie from 1.0.0 to 1.0.1 kinde-oss/kinde-auth-nextjs#236

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DunkeyMan-maker mentioned this pull request Nov 7, 2024

[Snyk] Upgrade cookie from 1.0.0 to 1.0.1 DunkeyMan-maker/multi-juicer#3

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remove hasOwnProperty call #183

remove hasOwnProperty call #183

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remove hasOwnProperty call #183

remove hasOwnProperty call #183

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