CI: run asv check on all builds

Author: pv

azure-pipelines.yml

@@ -97,10 +97,11 @@ jobs:
   - script: |
       export PATH=$HOME/miniconda3/bin:$PATH
       source activate pandas-dev
+      cd asv_bench
+      asv check -E existing
       git remote add upstream https://github.com/pandas-dev/pandas.git
       git fetch upstream
       if git diff upstream/master --name-only | grep -q "^asv_bench/"; then
-          cd asv_bench
           asv machine --yes
           ASV_OUTPUT="$(asv dev)"
           if [[ $(echo "$ASV_OUTPUT" | grep "failed") ]]; then