On 10/25/2017 9:31 PM, Alex Vandiver wrote:
This provides modest performance savings. Benchmarking with the
following program, with and without `--no-pretty`, we find savings of
23% (0.316s -> 0.242s) in the git repository, and savings of 8% (5.24s
-> 4.86s) on a large repository with 580k files in the working copy.
Given this patch series is all about speed, it's good to see *any* wins
- especially those that don't impact functionality at all. The
performance win of --no-pretty is greater than I expected.
#!/usr/bin/perl
use strict;
use warnings;
use IPC::Open2;
my $pid = open2(\*CHLD_OUT, \*CHLD_IN, "watchman -j @ARGV")
or die "open2() failed: $!\n" .
"Falling back to scanning...\n";
my $query = qq|["query", "$ENV{PWD}", {}]|;
print CHLD_IN $query;
close CHLD_IN;
my $response = do {local $/; <CHLD_OUT>};
my $json_pkg;
eval {
require JSON::XSomething;
$json_pkg = "JSON::XSomething";
1;
} or do {
require JSON::PP;
$json_pkg = "JSON::PP";
};
my $o = $json_pkg->new->utf8->decode($response);
Signed-off-by: Alex Vandiver <alexmv@xxxxxxxxxxx>
---
t/t7519/fsmonitor-watchman | 2 +-
templates/hooks--fsmonitor-watchman.sample | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/t/t7519/fsmonitor-watchman b/t/t7519/fsmonitor-watchman
index a3e30bf54..79f24325c 100755
--- a/t/t7519/fsmonitor-watchman
+++ b/t/t7519/fsmonitor-watchman
@@ -50,7 +50,7 @@ launch_watchman();
sub launch_watchman {
- my $pid = open2(\*CHLD_OUT, \*CHLD_IN, 'watchman -j')
+ my $pid = open2(\*CHLD_OUT, \*CHLD_IN, 'watchman -j --no-pretty')
Since this is a test script performance isn't critical. This version of
the integration script logs the response to a file in
.git/watchman-response.json and is much more human readable without the
"--no-pretty." As such, I'd leave this one pretty.
or die "open2() failed: $!\n" .
"Falling back to scanning...\n";
diff --git a/templates/hooks--fsmonitor-watchman.sample b/templates/hooks--fsmonitor-watchman.sample
index 9eba8a740..9a082f278 100755
--- a/templates/hooks--fsmonitor-watchman.sample
+++ b/templates/hooks--fsmonitor-watchman.sample
@@ -49,7 +49,7 @@ launch_watchman();
sub launch_watchman {
- my $pid = open2(\*CHLD_OUT, \*CHLD_IN, 'watchman -j')
+ my $pid = open2(\*CHLD_OUT, \*CHLD_IN, 'watchman -j --no-pretty')
No human will see this response so the faster --no-pretty option makes
sense.
or die "open2() failed: $!\n" .
"Falling back to scanning...\n";
