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From: Eric Wong <>
Subject: [PATCH 1/2] xap_helper_cxx: -O2 optimize read-only files by default
Date: Mon, 12 Feb 2024 21:28:03 +0000	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

While fast build times from -O0 is critical to my sanity when
actively working on C++, the files installed via package
managers or `make install' aren't likely to change frequently.

In that case, expensive -O2 optimizations make sense since the
10-20s saved from a single large --join more than covers the
cost of waiting on g++ to optimize.
 lib/PublicInbox/ | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/PublicInbox/ b/lib/PublicInbox/
index 6bd165b8..eafe61a8 100644
--- a/lib/PublicInbox/
+++ b/lib/PublicInbox/
@@ -30,6 +30,7 @@ my $xflags = ($ENV{CXXFLAGS} // '-Wall -ggdb3 -pipe') . ' ' .
 	' -DXH_SPEC="'.join('',
 		map { s/=.*/:/; $_ } @PublicInbox::Search::XH_SPEC) . '" ' .
 	($ENV{LDFLAGS} // $ldflags);
+substr($xflags, 0, 0, '-O2 ') if !defined($ENV{CXXFLAGS}) && !-w __FILE__;
 my $xap_modversion;
 sub xap_cfg (@) {

  reply	other threads:[~2024-02-12 21:28 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-02-12 21:28 [PATCH 0/2] xap_helper C++ fixes Eric Wong
2024-02-12 21:28 ` Eric Wong [this message]
2024-02-12 21:28 ` [PATCH 2/2] codesearch: generate_cxx: drop unused variables Eric Wong

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