Why this discrepancy?

--Sep 10 2015 11:26:09 GMT+0530 (IST)--

Is it because of caching?

1 Answer 1


There seem to be 2 or 3 effects, the biggest is that the Tags page also shows Synonyms.

There may also be a small cache effect, but there seems to be another discrepancy as well, possibly an error/bug.

You can see that the Tags page also shows Synonyms by:

  1. Go to the Tags page.
  2. Enter userscr in the Type to find tags: box.
  3. You will see something like:
    It's not real!
  4. Then use the Synonyms pages to see that userscript is a synonym of userscripts, not a real tag.
  5. The API call reflects this.

Combining the API's /tags route and the /tags/synonyms route, I currently get:

42020 + 2442 = 44462

If you count up all the tags on the Tags page(s), I currently get:

     4 columns
*    9 rows
* 1236 pages
+   10 on the last page (page 1237)

Which still gives a discrepancy of 44!

This is too big to be explained by caching. The Tags page seems almost real-time and the API count is updating at least once an hour.

The latest SEDE data is currently from Sep 6 at 6:11 (about 4 days ago) and SEDE shows that there were 44,377 tags + active synonyms at that time.

This suggests a growth rate of about 32 tags per day, or about 1.3 tags per hour -- which matches the observed increase in the API results.

This final discrepancy (44) is something else; quite possibly a bug.

Cross checking the Tag Synonyms page(s), set to the active tab gives:

    24 pages
*  100 Synonyms per page
+   42 on the last page (page 25)

Which agrees with the API result.

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