git/list[1] front-page[2] threads[3] people[4] search[5] about
 

[PATCH 6/6] name-hash: add perf test for lazy_init_name_hash

From
Ggit@jeffhostetler.com <git@jeffhostetler.com>
Date
Mar 22, 2017, 17:14 UTC
Message-ID
<1490202865-31325-7-git-send-email-git@jeffhostetler.com>
In-Reply-To
<1490202865-31325-1-git-send-email-git@jeffhostetler.com>
From: Jeff Hostetler <jeffhost@microsoft.com>

Created t/perf/p0004-lazy-init-name-hash.sh test to demonstrate correctness and performance gains with the multithreaded version of lazy_init_name_hash().

Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
---
 t/perf/p0004-lazy-init-name-hash.sh | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 t/perf/p0004-lazy-init-name-hash.sh
diff --git a/t/perf/p0004-lazy-init-name-hash.sh b/t/perf/p0004-lazy-init-name-hash.sh
new file mode 100644
index 0000000..5afa8c8
--- /dev/null
+++ b/t/perf/p0004-lazy-init-name-hash.sh
@@ -0,0 +1,19 @@
+#!/bin/sh
+
+test_description='Tests multi-threaded lazy_init_name_hash'
+. ./perf-lib.sh
+
+test_perf_large_repo
+test_checkout_worktree
+
+test_expect_success 'verify both methods build the same hashmaps' '
+	$GIT_BUILD_DIR/t/helper/test-lazy-init-name-hash$X --dump --single | sort >out.single &&
+	$GIT_BUILD_DIR/t/helper/test-lazy-init-name-hash$X --dump --multi  | sort >out.multi  &&
+	test_cmp out.single out.multi
+'
+
+test_expect_success 'multithreaded should be faster' '
+	$GIT_BUILD_DIR/t/helper/test-lazy-init-name-hash$X --perf >out.perf
+'
+
+test_done
-- 
2.7.4
Previous: git@jeffhostetler.comNext: git@jeffhostetler.com
Message 6 of 14 in “thread lazy_init_name_hash”
  1. 0/6 thread lazy_init_name_hashgit@jeffhostetler.com, Mar 22, 2017
  2. 3/6 hashmap: Add disallow_rehash settinggit@jeffhostetler.com, Mar 22, 2017
  3. 4/6 name-hash: perf improvement for lazy_init_name_hashgit@jeffhostetler.com, Mar 22, 2017
  4. 1/6 name-hash: specify initial size for istate.dir_hash tablegit@jeffhostetler.com, Mar 22, 2017
  5. 2/6 hashmap: allow memihash computation to be continuedgit@jeffhostetler.com, Mar 22, 2017
  6. 6/6 name-hash: add perf test for lazy_init_name_hashgit@jeffhostetler.com, Mar 22, 2017
  7. 5/6 name-hash: add test-lazy-init-name-hashgit@jeffhostetler.com, Mar 22, 2017
  8. Stefan BellerMar 22, 2017
  9. Jeff HostetlerMar 22, 2017
  10. Junio C HamanoMar 22, 2017
  11. Junio C HamanoMar 22, 2017
  12. Jeff HostetlerMar 22, 2017
  13. Junio C HamanoMar 22, 2017
  14. Junio C HamanoMar 22, 2017

Read the whole thread, see it on lore, or plain text.

$ cat FOOTERMessages come from the public archive at lore.kernel.org/git, fetched every hour. The front page is chosen and written each morning by an AI editor and can be wrong; the threads themselves are the record. About and API. For agents: an MCP server at https://gitlist.dev/mcp, and any thread, story or person page as Markdown by adding .md to its URL (or sending Accept: text/markdown). Details in /llms.txt.