Polyfill.io

Usage and performance

The public instance of the polyfill service is hosted by the Financial Times, with the generous support of Fastly, who provide CDN distribution. View Fastly network map

Traffic volume

This shows the number of requests we have served per day, over the last 180 days, measured by Fastly:

DateRequests
24 Aug 2017 00:0035960
25 Aug 2017 00:0032061
26 Aug 2017 00:0020937
27 Aug 2017 00:0028980
28 Aug 2017 00:0038503
29 Aug 2017 00:0035608
30 Aug 2017 00:0027442
31 Aug 2017 00:0025957
1 Sep 2017 00:0032924
2 Sep 2017 00:0026209
3 Sep 2017 00:0024733
4 Sep 2017 00:0038793
5 Sep 2017 00:0035800
6 Sep 2017 00:0043648
7 Sep 2017 00:0044329
8 Sep 2017 00:0019807
9 Sep 2017 00:0013950
10 Sep 2017 00:0014122
11 Sep 2017 00:0019304
12 Sep 2017 00:0018458
13 Sep 2017 00:0017228
14 Sep 2017 00:0017193
15 Sep 2017 00:0016695
16 Sep 2017 00:0012778
17 Sep 2017 00:0014574
18 Sep 2017 00:0019041
19 Sep 2017 00:0018509
20 Sep 2017 00:0019068
21 Sep 2017 00:0028252
22 Sep 2017 00:0030977
23 Sep 2017 00:0021591
24 Sep 2017 00:0019663
25 Sep 2017 00:0025435
26 Sep 2017 00:0021134
27 Sep 2017 00:0033318
28 Sep 2017 00:0027138
29 Sep 2017 00:0022274
30 Sep 2017 00:0018969
1 Oct 2017 00:0021628
2 Oct 2017 00:0029729
3 Oct 2017 00:0025613
4 Oct 2017 00:0033249
5 Oct 2017 00:0029151
6 Oct 2017 00:0024892
7 Oct 2017 00:0019163
8 Oct 2017 00:0018793
9 Oct 2017 00:0026464
10 Oct 2017 00:0024835
11 Oct 2017 00:0024083
12 Oct 2017 00:0022880
13 Oct 2017 00:0036585
14 Oct 2017 00:0022849
15 Oct 2017 00:0020893
16 Oct 2017 00:0024402
17 Oct 2017 00:0021452
18 Oct 2017 00:0018498
19 Oct 2017 00:0033279
20 Oct 2017 00:0023075
21 Oct 2017 00:0015389
22 Oct 2017 00:0016261
23 Oct 2017 00:0021955
24 Oct 2017 00:0022926
25 Oct 2017 00:0022666
26 Oct 2017 00:0028782
27 Oct 2017 00:0021050
28 Oct 2017 00:0015350
29 Oct 2017 00:0018613
30 Oct 2017 00:0023166
31 Oct 2017 00:0021061
1 Nov 2017 00:0022992
2 Nov 2017 00:0021318
3 Nov 2017 00:0018258
4 Nov 2017 00:0014184
5 Nov 2017 00:0015646
6 Nov 2017 00:0022356
7 Nov 2017 00:0022069
8 Nov 2017 00:0019766
9 Nov 2017 00:0020882
10 Nov 2017 00:0017796
11 Nov 2017 00:0015182
12 Nov 2017 00:0016366
13 Nov 2017 00:0025433
14 Nov 2017 00:0028570
15 Nov 2017 00:0024693
16 Nov 2017 00:0023059
17 Nov 2017 00:0024067
18 Nov 2017 00:0018272
19 Nov 2017 00:0018106
20 Nov 2017 00:0022212
21 Nov 2017 00:0021723
22 Nov 2017 00:008988
23 Nov 2017 00:008344
24 Nov 2017 00:009300
25 Nov 2017 00:008822
26 Nov 2017 00:007991
27 Nov 2017 00:008845
28 Nov 2017 00:008101
29 Nov 2017 00:007128
30 Nov 2017 00:005817
1 Dec 2017 00:0015567
2 Dec 2017 00:0021537
3 Dec 2017 00:0022818
4 Dec 2017 00:0022241
5 Dec 2017 00:0030284
6 Dec 2017 00:0030321
7 Dec 2017 00:0022847
8 Dec 2017 00:0022732
9 Dec 2017 00:0022808
10 Dec 2017 00:0022491
11 Dec 2017 00:0021144
12 Dec 2017 00:0025768
13 Dec 2017 00:0023905
14 Dec 2017 00:0020555
15 Dec 2017 00:0019081
16 Dec 2017 00:0018515
17 Dec 2017 00:0018654
18 Dec 2017 00:0020420
19 Dec 2017 00:0026129
20 Dec 2017 00:0016734
21 Dec 2017 00:0019287
22 Dec 2017 00:0015958
23 Dec 2017 00:0017069
24 Dec 2017 00:0019002
25 Dec 2017 00:0015732
26 Dec 2017 00:0028213
27 Dec 2017 00:0015392
28 Dec 2017 00:0017904
29 Dec 2017 00:0034888
30 Dec 2017 00:0016706
31 Dec 2017 00:006707
1 Jan 2018 00:005632
2 Jan 2018 00:0010641
3 Jan 2018 00:006840
4 Jan 2018 00:007508
5 Jan 2018 00:008670
6 Jan 2018 00:006936
7 Jan 2018 00:0010064
8 Jan 2018 00:008706
9 Jan 2018 00:008389
10 Jan 2018 00:008837
11 Jan 2018 00:008471
12 Jan 2018 00:0010868
13 Jan 2018 00:009740
14 Jan 2018 00:008403
15 Jan 2018 00:009459
16 Jan 2018 00:008729
17 Jan 2018 00:009291
18 Jan 2018 00:009173
19 Jan 2018 00:009380
20 Jan 2018 00:009737
21 Jan 2018 00:008458
22 Jan 2018 00:009067
23 Jan 2018 00:008508
24 Jan 2018 00:008939
25 Jan 2018 00:008471
26 Jan 2018 00:009966
27 Jan 2018 00:009285
28 Jan 2018 00:008886
29 Jan 2018 00:0012254
30 Jan 2018 00:0012351
31 Jan 2018 00:0015165
1 Feb 2018 00:009900
2 Feb 2018 00:0010412
3 Feb 2018 00:009329
4 Feb 2018 00:009796
5 Feb 2018 00:009899
6 Feb 2018 00:0010055
7 Feb 2018 00:0094324
8 Feb 2018 00:00114891
9 Feb 2018 00:0073727
10 Feb 2018 00:0063576
11 Feb 2018 00:0051231
12 Feb 2018 00:0033918
13 Feb 2018 00:0013188
14 Feb 2018 00:0030890
15 Feb 2018 00:0011399
16 Feb 2018 00:0013417
17 Feb 2018 00:009987
18 Feb 2018 00:0010937
19 Feb 2018 00:009923

Response time

Mean global response time, ms, from Pingdom:

DateResponse time (ms)
13 Feb 2018 21:00416
13 Feb 2018 22:00387
13 Feb 2018 23:00386
14 Feb 2018 00:00385
14 Feb 2018 01:00380
14 Feb 2018 02:00389
14 Feb 2018 03:00380
14 Feb 2018 04:00378
14 Feb 2018 05:00375
14 Feb 2018 06:00382
14 Feb 2018 07:00388
14 Feb 2018 08:00393
14 Feb 2018 09:00403
14 Feb 2018 10:00397
14 Feb 2018 11:00394
14 Feb 2018 12:00398
14 Feb 2018 13:00415
14 Feb 2018 14:00411
14 Feb 2018 15:00413
14 Feb 2018 16:00423
14 Feb 2018 17:00389
14 Feb 2018 18:00403
14 Feb 2018 19:00420
14 Feb 2018 20:00408
14 Feb 2018 21:00418
14 Feb 2018 22:00399
14 Feb 2018 23:00395
15 Feb 2018 00:00383
15 Feb 2018 01:00377
15 Feb 2018 02:00377
15 Feb 2018 03:00379
15 Feb 2018 04:00436
15 Feb 2018 05:00387
15 Feb 2018 06:00400
15 Feb 2018 07:00399
15 Feb 2018 08:00409
15 Feb 2018 09:00408
15 Feb 2018 10:00408
15 Feb 2018 11:00399
15 Feb 2018 12:00398
15 Feb 2018 13:00403
15 Feb 2018 14:00414
15 Feb 2018 15:00411
15 Feb 2018 16:00417
15 Feb 2018 17:00407
15 Feb 2018 18:00401
15 Feb 2018 19:00392
15 Feb 2018 20:00415
15 Feb 2018 21:00422
15 Feb 2018 22:00448
15 Feb 2018 23:00423
16 Feb 2018 00:00418
16 Feb 2018 01:00401
16 Feb 2018 02:00386
16 Feb 2018 03:00389
16 Feb 2018 04:00383
16 Feb 2018 05:00393
16 Feb 2018 06:00402
16 Feb 2018 07:00384
16 Feb 2018 08:00393
16 Feb 2018 09:00416
16 Feb 2018 10:00378
16 Feb 2018 11:00391
16 Feb 2018 12:00389
16 Feb 2018 13:00398
16 Feb 2018 14:00393
16 Feb 2018 15:00394
16 Feb 2018 16:00397
16 Feb 2018 17:00415
16 Feb 2018 18:00404
16 Feb 2018 19:00389
16 Feb 2018 20:00404
16 Feb 2018 21:00419
16 Feb 2018 22:00423
16 Feb 2018 23:00430
17 Feb 2018 00:00398
17 Feb 2018 01:00375
17 Feb 2018 02:00372
17 Feb 2018 03:00397
17 Feb 2018 04:00381
17 Feb 2018 05:00373
17 Feb 2018 06:00374
17 Feb 2018 07:00383
17 Feb 2018 08:00402
17 Feb 2018 09:00421
17 Feb 2018 10:00436
17 Feb 2018 11:00419
17 Feb 2018 12:00425
17 Feb 2018 13:00410
17 Feb 2018 14:00423
17 Feb 2018 15:00439
17 Feb 2018 16:00423
17 Feb 2018 17:00424
17 Feb 2018 18:00434
17 Feb 2018 19:00430
17 Feb 2018 20:00422
17 Feb 2018 21:00419
17 Feb 2018 22:00420
17 Feb 2018 23:00414
18 Feb 2018 00:00404
18 Feb 2018 01:00397
18 Feb 2018 02:00383
18 Feb 2018 03:00388
18 Feb 2018 04:00379
18 Feb 2018 05:00376
18 Feb 2018 06:00392
18 Feb 2018 07:00396
18 Feb 2018 08:00409
18 Feb 2018 09:00429
18 Feb 2018 10:00419
18 Feb 2018 11:00412
18 Feb 2018 12:00405
18 Feb 2018 13:00431
18 Feb 2018 14:00422
18 Feb 2018 15:00415
18 Feb 2018 16:00433
18 Feb 2018 17:00426
18 Feb 2018 18:00430
18 Feb 2018 19:00412
18 Feb 2018 20:00412
18 Feb 2018 21:00579
18 Feb 2018 22:00394
18 Feb 2018 23:00386
19 Feb 2018 00:00391
19 Feb 2018 01:00382
19 Feb 2018 02:00390
19 Feb 2018 03:00369
19 Feb 2018 04:00383
19 Feb 2018 05:00378
19 Feb 2018 06:00386
19 Feb 2018 07:00397
19 Feb 2018 08:00400
19 Feb 2018 09:00412
19 Feb 2018 10:00406
19 Feb 2018 11:00395
19 Feb 2018 12:00398
19 Feb 2018 13:00402
19 Feb 2018 14:00417
19 Feb 2018 15:00407
19 Feb 2018 16:00446
19 Feb 2018 17:00420
19 Feb 2018 18:00416
19 Feb 2018 19:00408
19 Feb 2018 20:00433
19 Feb 2018 21:00401
19 Feb 2018 22:00384
19 Feb 2018 23:00387
20 Feb 2018 00:00398
20 Feb 2018 01:00377
20 Feb 2018 02:00371
20 Feb 2018 03:00366
20 Feb 2018 04:00361
20 Feb 2018 05:00369
20 Feb 2018 06:00364
20 Feb 2018 07:00390
20 Feb 2018 08:00417
20 Feb 2018 09:00384
20 Feb 2018 10:00408
20 Feb 2018 11:00412
20 Feb 2018 12:00405
20 Feb 2018 13:00401
20 Feb 2018 14:00418
20 Feb 2018 15:00415
20 Feb 2018 16:00410
20 Feb 2018 17:00439
20 Feb 2018 18:00430
20 Feb 2018 19:00448
20 Feb 2018 20:00432
20 Feb 2018 21:00424

Caching

Hit ratio, last 7 days, from Fastly:

Cache resultRequests
Hits95103
Misses4085

Availability

Total downtime, according to Pingdom:

Last 30 daysNone
Last 3 months2 minutes
Last 12 months22 minutes

Caching responses that vary by User-Agent is very hard to do with good cache performance. We use a custom Fastly VCL configuration that separates the UA normalisation from the polyfill bundle.