She was already a sub 30 10k type at World's. Was Hassan really just a low 30s runner there? It was obvious Gidey was much better than that, but this is off the hook--she averaged about 29:33 per 10k here. Only a Chinese doper and two Ethiopians have run faster over 10000m on the track than that pace she sustained for 50% more in this race over 7 hills. All-time #2 and #3 in the 10000m were run at a BARELY better pace than this. #4 all-time, run by a 14:11 5000m runner who still holds the wr for that event, is 9 seconds per 10k slower than this pace. #8 all-time, Defar, ran 14:12 for 5000m.
All-time women's best 10 000m
1 29:17.45 Almaz Ayana ETH 21.11.91 1 Rio de Janeiro 12.08.2016
2 29:31.78 Wang Junxia CHN 09.01.73 1 Beijing 08.09.1993
3 29:32.53 Vivian Cheruiyot KEN 11.09.83 2 Rio de Janeiro 12.08.2016
4 29:42.56 Tirunesh Dibaba ETH 01.06.85 3 Rio de Janeiro 12.08.2016
5 29:53.51 Alice Nawowuna KEN 11.03.94 4 Rio de Janeiro 12.08.2016
6 29:53.80 Meselech Melkamu ETH 19.04.85 1 Utrecht 14.06.2009
7 29:54.66 Tirunesh Dibaba ETH 01.06.85 1 Beijing 15.08.2008
8 29:59.20 Meseret Defar ETH 19.11.83 1 Birmingham 11.07.2009
All-time women's best 5000m
1 14:11.15 Tirunesh Dibaba ETH 01.06.85 1 Oslo 06.06.2008
2 14:12.59 Almaz Ayana ETH 21.11.91 1 Roma 02.06.2016
3 14:12.88 Meseret Defar ETH 19.11.83 1 Stockholm 22.07.2008
4 14:14.32 Almaz Ayana ETH 21.11.91 1 Shanghai 17.05.2015
5 14:15.41 Genzebe Dibaba ETH 08.02.91 1 Saint-Denis 04.07.2015
6 14:16.31 Almaz Ayana ETH 21.11.91 1 Rabat 22.05.2016
7 14:16.63 Meseret Defar ETH 19.11.83 1 Oslo 15.06.2007
8 14:18.37 Helen Obiri KEN 13.12.89 1 Roma 08.06.2017
9 14:18.89 Almaz Ayana ETH 21.11.91 1 Bruxelles 09.09.2016
10 14:19.76 Genzebe Dibaba ETH 08.02.91 1 Eugene 30.05.2015
11 14:20.36 Helen Obiri KEN 13.12.89 1 London 21.07.2019
12 14:20.68 Agnes Tirop KEN 23.10.95 2 London 21.07.2019
13 14:20.87 Vivian Cheruiyot KEN 11.09.83 1 Stockholm 29.07.2011
14 14:21.29 Genzebe Dibaba ETH 08.02.91 1 Oslo 11.06.2015
15 14:21.75 Helen Obiri KEN 13.12.89 1 Rabat 13.07.2018
16 14:21.97 Almaz Ayana ETH 21.11.91 2 Saint-Denis 04.07.2015
17 14:22.12 Sifan Hassan NED 01.01.93 3 London 21.07.2019
18 14:22.34 Sifan Hassan NED 01.01.93 2 Rabat 13.07.2018
19 14:22.47 Helen Obiri KEN 13.12.89 1 Shanghai 13.05.2017
20 14:22.51 Vivian Cheruiyot KEN 11.09.83 2 Oslo 15.06.2007
21 14:23.14 Letesenbet Gidey ETH 20.03.98 3 Rabat 13.07.2018