alamb commented on code in PR #10070:
URL: 
https://github.com/apache/arrow-datafusion/pull/10070#discussion_r1564037926


##########
benchmarks/.gitignore:
##########
@@ -1,2 +1,3 @@
 data
-results
\ No newline at end of file
+results
+.venv

Review Comment:
   the script makes a `venv` directory, not a `.venv` directory, should this be 
`venv`?



##########
benchmarks/bench.sh:
##########
@@ -440,6 +440,9 @@ compare_benchmarks() {
     fi
 
     echo "Comparing ${BRANCH1} and ${BRANCH2}"
+    python3 -m venv ./${SCRIPT_DIR}/venv

Review Comment:
   I think automatically creating / removing a virtual env each run may be 
surprising to people already managing their enviornment
   
   What would you think about adding a new command that worked like `bench.sh 
data` like `bench.sh venv`
   
   That might work like
   
   ```shell
   # creates virtual environment in $SCRIPT_DIR/venv (alongside data)
   # prints out a message about how to activate it
   $ bench.sh venv
   $ source venv/bin/activate.sh # do what bench.sh tells you
   ...
   $ bench.sh run tpch
   ```
   
   



##########
benchmarks/compare.py:
##########
@@ -24,14 +24,8 @@
 from typing import Dict, List, Any
 from pathlib import Path
 from argparse import ArgumentParser
-
-try:

Review Comment:
   I think this is still a helpful error message



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