* [PATCH 00/30] www: eliminate most per-request closures
@ 2019-12-25 7:50 6% Eric Wong
2019-12-25 7:50 7% ` [PATCH 12/30] qspawn: drop "qspawn.filter" support, for now Eric Wong
0 siblings, 1 reply; 2+ results
From: Eric Wong @ 2019-12-25 7:50 UTC (permalink / raw)
To: meta
Closures (aka "anonymous subs") tack several KB of memory onto
every WWW request/response, decreasing scalability and
performance of our WWW endpoints. They also increase human
review time to check for reference cycles.
Similar changes to -nntpd and the generic parts of -httpd were
also done recently:
https://public-inbox.org/meta/20191221235319.27082-1-e@80x24.org/
https://public-inbox.org/meta/20191221080007.27810-1-e@80x24.org/
These could still use some naming improvements, and it's been
pretty tiring writing the same-ish commit message over and over.
All these changes around eliminating closures also make it
easier to port our codebase to languages which lack closures.
Fwiw, I've been brainstorming ideas to create a new, refcounted
language where cyclic references are impossible by design. Such
a design would not be possible if closures were implemented; but
doable otherwise by taking a hint from *nix FSes.
Eric Wong (30):
git: allow async_cat to pass arg to callback
httpd/async: support passing arg to callbacks
qspawn: remove some anonymous subs for psgi_qx
qspawn: disambiguate command vs PSGI env
qspawn: replace anonymous $end callbacks w/ event_step
msg_iter: provide means to stop using anonymous subs
qspawn: reduce local vars, de-anonymize rd_hdr
httpd/async: get rid of ephemeral main_cb
qspawn: psgi_return: initial cb can be named
qspawn: psgi_return_start: hoist out from psgi_return
qspawn: psgi_qx: eliminate anonymous subs
qspawn: drop "qspawn.filter" support, for now
qspawn: psgi_return: allow non-anon parse_hdr callback
githttpbackend: split out wwwstatic
www: lazy load Plack::Util
mboxgz: pass $ctx to callback to avoid anon subs
feed: avoid anonymous subs
config: each_inbox: pass user arg to callback
view: avoid anon sub in stream_thread
view: msg_html: stop using an anonymous sub
contentid: no anonymous sub
wwwtext: avoid anonymous sub in response
searchview: pass named subs to Www*Stream
view: thread_html: pass named sub to WwwStream
searchview: remove anonymous sub when sorting threads by relevance
view: msg_iter calls add_body_text directly
wwwattach: avoid anonymous sub for msg_iter
viewvcs: avoid anonymous sub for HTML response
solvergit: allow passing arg to user-supplied callback
search: retry_reopen passes user arg to callback
MANIFEST | 1 +
lib/PublicInbox/Cgit.pm | 19 +-
lib/PublicInbox/Config.pm | 11 +-
lib/PublicInbox/ContentId.pm | 53 +++---
lib/PublicInbox/ExtMsg.pm | 58 +++---
lib/PublicInbox/Feed.pm | 51 +++--
lib/PublicInbox/GetlineBody.pm | 12 +-
lib/PublicInbox/Git.pm | 14 +-
lib/PublicInbox/GitHTTPBackend.pm | 99 +---------
lib/PublicInbox/HTTPD/Async.pm | 56 +++---
lib/PublicInbox/Mbox.pm | 131 +++++++------
lib/PublicInbox/MboxGz.pm | 2 +-
lib/PublicInbox/MsgIter.pm | 8 +-
lib/PublicInbox/NewsWWW.pm | 16 +-
lib/PublicInbox/Qspawn.pm | 296 +++++++++++++++---------------
lib/PublicInbox/Search.pm | 16 +-
lib/PublicInbox/SearchMsg.pm | 9 +-
lib/PublicInbox/SearchView.pm | 100 +++++-----
lib/PublicInbox/SolverGit.pm | 149 ++++++++-------
lib/PublicInbox/View.pm | 187 ++++++++++---------
lib/PublicInbox/ViewVCS.pm | 111 ++++++-----
lib/PublicInbox/WWW.pm | 2 +-
lib/PublicInbox/WwwAtomStream.pm | 2 +-
lib/PublicInbox/WwwAttach.pm | 49 ++---
lib/PublicInbox/WwwListing.pm | 37 ++--
lib/PublicInbox/WwwStatic.pm | 105 +++++++++++
lib/PublicInbox/WwwText.pm | 20 +-
t/git.t | 21 +++
t/qspawn.t | 19 +-
29 files changed, 882 insertions(+), 772 deletions(-)
create mode 100644 lib/PublicInbox/WwwStatic.pm
^ permalink raw reply [relevance 6%]
* [PATCH 12/30] qspawn: drop "qspawn.filter" support, for now
2019-12-25 7:50 6% [PATCH 00/30] www: eliminate most per-request closures Eric Wong
@ 2019-12-25 7:50 7% ` Eric Wong
0 siblings, 0 replies; 2+ results
From: Eric Wong @ 2019-12-25 7:50 UTC (permalink / raw)
To: meta
This feature was added in preparation for future changes
that have yet to materialize after nearly 3 years. We
can re-add it if needed in the future.
---
lib/PublicInbox/GetlineBody.pm | 6 +++---
lib/PublicInbox/Qspawn.pm | 21 +--------------------
2 files changed, 4 insertions(+), 23 deletions(-)
diff --git a/lib/PublicInbox/GetlineBody.pm b/lib/PublicInbox/GetlineBody.pm
index 750a8c53..bcabc04a 100644
--- a/lib/PublicInbox/GetlineBody.pm
+++ b/lib/PublicInbox/GetlineBody.pm
@@ -13,13 +13,13 @@ use strict;
use warnings;
sub new {
- my ($class, $rpipe, $end, $end_arg, $buf, $filter) = @_;
+ my ($class, $rpipe, $end, $end_arg, $buf) = @_;
bless {
rpipe => $rpipe,
end => $end,
end_arg => $end_arg,
buf => $buf,
- filter => $filter || 0,
+ filter => 0,
}, $class;
}
@@ -36,7 +36,7 @@ sub getline {
my $buf = delete $self->{buf}; # initial buffer
$buf = $self->{rpipe}->getline unless defined $buf;
$self->{filter} = -1 unless defined $buf; # set EOF for next call
- $filter ? $filter->($buf) : $buf;
+ $buf;
}
sub close {
diff --git a/lib/PublicInbox/Qspawn.pm b/lib/PublicInbox/Qspawn.pm
index 9e161234..d1a34bea 100644
--- a/lib/PublicInbox/Qspawn.pm
+++ b/lib/PublicInbox/Qspawn.pm
@@ -27,7 +27,6 @@ package PublicInbox::Qspawn;
use strict;
use warnings;
use PublicInbox::Spawn qw(popen_rd);
-require Plack::Util;
# n.b.: we get EAGAIN with public-inbox-httpd, and EINTR on other PSGI servers
use Errno qw(EAGAIN EINTR);
@@ -197,19 +196,6 @@ sub psgi_qx {
start($self, $limiter, \&psgi_qx_start);
}
-# create a filter for "push"-based streaming PSGI writes used by HTTPD::Async
-sub filter_fh ($$) {
- my ($fh, $filter) = @_;
- Plack::Util::inline_object(
- close => sub {
- $fh->write($filter->(undef));
- $fh->close;
- },
- write => sub {
- $fh->write($filter->($_[0]));
- });
-}
-
# this is called on pipe EOF to reap the process, may be called
# via PublicInbox::DS event loop OR via GetlineBody for generic
# PSGI servers.
@@ -251,7 +237,6 @@ sub psgi_return_init_cb {
my ($self) = @_;
my $r = rd_hdr($self) or return;
my $env = $self->{psgi_env};
- my $filter = delete $env->{'qspawn.filter'};
my $wcb = delete $env->{'qspawn.wcb'};
my $async = delete $self->{async};
if (scalar(@$r) == 3) { # error
@@ -266,7 +251,6 @@ sub psgi_return_init_cb {
} elsif ($async) {
# done reading headers, handoff to read body
my $fh = $wcb->($r); # scalar @$r == 2
- $fh = filter_fh($fh, $filter) if $filter;
$self->{fh} = $fh;
$async->async_pass($env->{'psgix.io'}, $fh,
delete($self->{hdr_buf}));
@@ -274,7 +258,7 @@ sub psgi_return_init_cb {
require PublicInbox::GetlineBody;
$r->[2] = PublicInbox::GetlineBody->new($self->{rpipe},
\&event_step, $self,
- ${$self->{hdr_buf}}, $filter);
+ ${$self->{hdr_buf}});
$wcb->($r);
}
@@ -304,9 +288,6 @@ sub psgi_return_start { # may run later, much later...
# psgi_return will return an anonymous
# sub for the PSGI server to call
#
-# $env->{'qspawn.filter'} - filter callback, receives a string as input,
-# undef on EOF
-#
# $limiter - the Limiter object to use (uses the def_limiter if not given)
#
# $parse_hdr - Initial read function; often for parsing CGI header output.
^ permalink raw reply related [relevance 7%]
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2019-12-25 7:50 6% [PATCH 00/30] www: eliminate most per-request closures Eric Wong
2019-12-25 7:50 7% ` [PATCH 12/30] qspawn: drop "qspawn.filter" support, for now Eric Wong
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