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* Add a test to demonstrate the quadratic complexity of referrer

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(de)registration, in particular garbage collection (NIX-23).
This commit is contained in:
Eelco Dolstra 2005-12-11 19:25:48 +00:00
parent a33b561a6b
commit 18bbcb1214
2 changed files with 16 additions and 1 deletions
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2
tests/Makefile.am
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@ -39,7 +39,7 @@ gc-concurrent.sh: gc-concurrent.nix gc-concurrent2.nix
TESTS = init.sh hash.sh lang.sh simple.sh dependencies.sh locking.sh parallel.sh \
build-hook.sh substitutes.sh substitutes2.sh fallback.sh nix-push.sh gc.sh \
gc-concurrent.sh verify.sh nix-pull.sh
gc-concurrent.sh verify.sh nix-pull.sh referrers.sh
XFAIL_TESTS =

15
tests/referrers.sh Normal file
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@ -0,0 +1,15 @@
max=5000
reference=$NIX_STORE_DIR/abcdef
touch $reference
(echo $reference && echo && echo 0) | $TOP/src/nix-store/nix-store --register-validity
echo "registering..."
time for ((n = 0; n < $max; n ++)); do
storePath=$NIX_STORE_DIR/$n
touch $storePath
(echo $storePath && echo && echo 1 && echo $reference)
done | $TOP/src/nix-store/nix-store --register-validity
echo "collecting garbage..."
time $TOP/src/nix-store/nix-store --gc 2> /dev/null