Big changes in browser usage stats in regional stats

Fyrd / caniuse

Raw browser/feature support data from caniuse.com

https://caniuse.com

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Big changes in browser usage stats in regional stats #6819

Open sashachabin opened 1 year ago

sashachabin commented 1 year ago

Hi!

My same Issue exactly one year ago: https://github.com/Fyrd/caniuse/issues/6426

In 20 regions audience coverage is more than 100% (Antarctica 102.6%, Tuvalu 102%, Vatican City 103.7% etc.)
China audience coverage has big changes 93.39% → 96.88% (from version 1.0.30001523 to 1.0.30001524)
UPD: big stats changes from version to version in China

This affects the browserslist website and browserslist-lint.

Demo

1. Sum of usage in regions > 100%

I created demo with version 1.0.30001525 from CDN. Large values are shown in bold https://codepen.io/nibach/pen/KKbgZxx

2. Big changes in China stats

Regional changes from version to version in CN.json https://docs.google.com/spreadsheets/d/13XUk2aMpE9Qe_SWng2-FwZqT9_cPOrhWsikrP9TSzWA/edit#gid=0

sashachabin commented 1 year ago

And I found big changes in IE 11 usage statistics in China 1.9% → 6.4%

caniuse-db@1.0.30001523

caniuse-db@1.0.30001525

sashachabin commented 1 year ago

I did some more research. And I found big changes in regional stats in China (CN.json region).

For example, IE 11 stats in CN:

1.0.30001524 (8/27/2023) — 6.39511%
1.0.30001512 (7/4/2023) — 1.95163%
1.0.30001494 (6/4/2023) — 3.10006%
1.0.30001485 (5/6/2023) — 2.26814%

I create Google Spreadsheet with changes over the last months: https://docs.google.com/spreadsheets/d/13XUk2aMpE9Qe_SWng2-FwZqT9_cPOrhWsikrP9TSzWA/edit#gid=0

Fyrd commented 1 year ago

Thanks for pointing these out, indeed a number of regions this month had bad data due to being processed before the previous month's statcounter data was ready. Have just updated these regions and the numbers for August should be correct now.

sashachabin commented 1 year ago

Thank you!

I checked new caniuse-db 1.0.30001532 version. This problem with value greater than 100% is fixed!

sashachabin commented 1 year ago

I compared statcounter data in China in August and latest CN.json in caniuse-db.

statcounter chart

CN.json in caniuse-db

Some browsers with stats differences

	statcounter	caniuse
Chrome For Android (and_chr 0)	37.94%	51.5564%
Edge 115	4.93%	1.7372%
Chrome 115	1.37%	0.4816%
Chrome 98	1.03%	0.35432%

sashachabin commented 1 year ago

@Fyrd Why do you think there might be such a difference in regional stats?