Re: Thrift
On Wednesday, 16 September 2015 at 16:57:39 UTC, ddos wrote: Looking for a RPC library, thrift looked promising, but i can't even compile the simple example given here https://thrift.apache.org/tutorial/d I just ran into the same thing. I tried earlier branches of Thrift and those don't work either, but for different reasons.
Re: A valid code that won't run?
On Friday, 24 April 2015 at 21:47:50 UTC, cym13 wrote: Reimplementing sure sounds like the best long-term way to go... Maybe we don't need all libcurl features, we could provide a basic set for 80% of use-cases and advanced users would use the newly-non-standard libcurl binding. Vibed already provides a good HTTP library. There is also an HTTP/2 library on dub that is being incorporated into Vibed. I would suggesting using these if you are doing anything new rather than using std.net.curl.
Re: Bugzilla email queue jammed?
On Wednesday, 18 February 2015 at 23:51:29 UTC, Brad Roberts wrote: Hrm.. that'd be my job. Brad, thanks for keeping the infrastructure running.
Re: Bugzilla email queue jammed?
On Thursday, 19 February 2015 at 01:02:48 UTC, David Eagen wrote: On Wednesday, 18 February 2015 at 23:51:29 UTC, Brad Roberts wrote: Hrm.. that'd be my job. Brad, thanks for keeping the infrastructure running. What I meant to say was that as an admin myself I know how critical things like this are and how there is no spotlight and praise for when things go well. It's only when things break that attention turns to the admins. :)
Re: InternetAddress comparison fail
On Saturday, 3 January 2015 at 01:16:39 UTC, Jonathan Marler
wrote:
Why doesn't the equals operator work on the InternetAddress
class?
import std.stdio;
import std.socket;
void main()
{
auto addr1 = new InternetAddress(192.168.0.1, 80);
auto addr2 = new InternetAddress(192.168.0.1, 80);
assert(addr1 == addr2); // FAILS
}
If I am not mistaken, the == operator is overriden by the
opEquals method. I don't see any opEquals method in std.socket
so I'm wondering if this is by design or someone overlooked it?
I ran into this too and made a helper to do the comparison (using
toAddrString) so I could move forward with my project.
Adding opEquals and opCmp is probably low-hanging fruit and a
good place for someone to start working on Phobos.
Re: Lost a new commercial user this week :(
The worst part of the docs is the mass of linked text at the top. When are we going to switch to the new layout? It's much better than the current layout.
Re: 'int' is enough for 'length' to migrate code from x86 to x64
Isn't the purpose of size_t is to be large enough to address all available memory? A negative value is not only too small but doesn't make sense when discussing lengths. Correctness requires using size_t.
Re: D2 (Debian) + MSSQL
If there is a C library for MSSQL you should be able to use that from your D code. If you do, it would be handy for others if you could publish any bindings you create as a dub package (code.dlang.org).
Re: Default arguments in function callbacks not taken into account when instantiating templates has huge security implications
Is this in Bugzilla?
Re: A simple sieve in Phobos?
On Thursday, 20 March 2014 at 21:31:13 UTC, Gary Willoughby wrote: For experimental libs i'd rather they were kept out of phobos and placed within the dub registry. We can load and use them at leisure from there without expecting any sort of support from the language maintainers. If included in phobos i can almost guarantee that even though they will be marked experimental devs will moan when they change because they will have an official stamp. +1
Re: Good name for f.byLine.map!(x = x.idup)?
copyByLine
Re: Formal review of std.buffer.scopebuffer
I've started using it in a project to replace a simple dynamic array buffer and so far it has fit my needs very well. One thing I ran into was a method in the project's API that has this signature: const(ubyte[]) foo() const I couldn't return a slice from ScopeBuffer directly because of the const. I resolved it by changing opSlice's signature in ScopeBuffer to this: @system inout(T[]) opSlice() inout So there are two questions: 1.) Is this a good way to resolve the problem or am I doing something horribly wrong? 2.) Assuming this isn't horribly wrong should ScopeBuffer use inout like this?
Compiler version at compile-time
Is there a way to determine the compiler version at compile time?
Something like:
static if(DMD_VERSION = 2.066) {
virtual int foo();
} else {
int foo();
}
Re: Compiler version at compile-time
On Wednesday, 12 March 2014 at 02:46:30 UTC, David Eagen wrote:
Is there a way to determine the compiler version at compile
time? Something like:
static if(DMD_VERSION = 2.066) {
virtual int foo();
} else {
int foo();
}
Naturally I found it as soon as I posted
std.compiler : version_major, version_minor;
Re: Thrift maintained..?
On Wednesday, 12 February 2014 at 07:53:44 UTC, simendsjo wrote: Well, that seems quite unprofessional.. Not fixing bugs that makes parts of their repository unusable.. To be fair he wasn't able to reproduce the problem. It built fine on his box. They list automake 1.9 as the requirement so presumably he isn't running 1.13 and that's why he didn't run into it. I'm hoping to fix it in 1.13 in a way that also works for earlier versions of automake. If I can I'll reopen an contribute a patch. Now if I can just figure out how automake works
Re: Thrift maintained..?
On Wednesday, 25 December 2013 at 17:14:17 UTC, David Eagen wrote: I've filed a bug: https://issues.apache.org/jira/browse/THRIFT-2294 So the Thrift guys are not too excited about fixing this. The bug was closed since it affected just the D library. I think the problem stems from the fact that I have automake 1.13 which uses the parallel test harness by default. You can convert back to the serial test harness by setting this in configure.ac: AM_INIT_AUTOMAKE([1.11 tar-ustar serial-tests]) The serial test harness is the default for automake 1.12 and earlier. There must be a reason the D library's Makefile is screwed up when the parallel test harness is used but so far I haven't found it.
Re: Thrift maintained..?
On Wednesday, 12 February 2014 at 02:27:51 UTC, David Eagen wrote: You can convert back to the serial test harness by setting this in configure.ac: AM_INIT_AUTOMAKE([1.11 tar-ustar serial-tests]) I should have pointed out that using the serial-tests option with automake 1.13 results in a correct D Makefile and a successful thrift build.
Re: inotify and recursion
On Friday, 27 December 2013 at 10:56:55 UTC, Artur Skawina wrote: You probably meant read(inotfd, event, (*event).sizeof); but in this case the inotify_event structure contains an optional trailing buffer, so it should be read(inotfd, event, bufsiz); artur Yes, thanks for the correction. I had trouble getting the file name from the event. I think it's because the inotify module has name defined as char[0]. So I did this, which prints the name by using the extra data beyond the inotify_event struct itself: void* buf = GC.malloc(bufsiz); /* wait for an event to occur */ size_t readlen = read(inotfd, buf, bufsiz); inotify_event* event = cast(inotify_event*) (buf); /* process event struct here */ writeln(Received inotify event:); writeln(Bytes read: , readlen); writeln(Length: , event.len); writeln(Name:, cast(char[])(buf[event.len..readlen]));
Re: Mobile App STACK4 with a D backend
My only problem is I can't beat the dang AI. :)
Re: inotify and recursion
Here is a first attempt. I'm sure there are much better ways to
do this but this should at least get you going in the right
direction.
Some of the key things to know are the undocumented (at least not
documented on the web site) modules that are available. One of
them contains the Linux inotify header. If you've downloaded the
zip file from the website take a look at the src/druntime/src
directory for these modules.
I took the example from
http://stackoverflow.com/questions/4062806/inotify-how-to-use-it-linux
and made some changes to get it to compile and run in D.
import core.sys.linux.sys.inotify;
import core.stdc.stdlib : malloc;
import core.sys.posix.unistd : read;
import std.stdio : writeln;
import std.string: toStringz;
enum PATH_MAX = 256;
void main()
{
string filename=aaa;
int inotfd = inotify_init();
int watch_desc = inotify_add_watch(inotfd,
toStringz(filename), IN_MODIFY);
size_t bufsiz = inotify_event.sizeof + PATH_MAX + 1;
inotify_event* event = cast(inotify_event *) malloc(bufsiz);
/* wait for an event to occur */
read(inotfd, event, event.sizeof);
/* process event struct here */
writeln(Received inotify event.);
}
As far as monitoring a directory, you can do that with inotify
the same way you would a file. See
http://www.ibm.com/developerworks/linux/library/l-ubuntu-inotify/index.html
for more a C example (Listing 1).
Re: inotify and recursion
On Friday, 27 December 2013 at 03:39:58 UTC, Hugo Florentino wrote: BTW, it it a requirement to use malloc, and if so, when would I need to free the memory allocated by it? Inotify is expecting you to read into a buffer. You could allocate that buffer from the GC with core.memory.malloc() instead. You want to free the memory once you finish processing the event.
Re: Thrift maintained..?
On Saturday, 21 December 2013 at 19:20:44 UTC, Martin Nowak wrote: Rebuild autoconf and automake files? Try ./bootstrap.sh ./configure make. That's what actually breaks it. I was messing around on another box where Thrift compiled just fine and found my configure script was not calling ./bootstrap.sh first so it was using old Makefiles. Unfortunately I don't know how long ago I ran bootsrap.sh on that box so I don't know what version broke the Makefile generation. I've filed a bug: https://issues.apache.org/jira/browse/THRIFT-2294
Re: Thrift maintained..?
On Friday, 15 November 2013 at 21:11:36 UTC, simendsjo wrote: I thrid compiling thrift 0.9.1 from github with d support, but there's a bug in the makefile it seems. $(addprefix.log: $(addprefix @p='$(addprefix'; \ b='$(addprefix'; \ $(am__check_pre) $(LOG_DRIVER) --test-name $$f \ --log-file $$b.log --trs-file $$b.trs \ $(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \ $$tst $(AM_TESTS_FD_REDIRECT) The error is reported at the first line with the message: Makefile:1206: *** unterminated variable reference. Stop. Can anyone spot the error? (And preferably send a pull request so I don't take the credit :) ) I ran into this same problem but haven't had time to look into what is required to fix it. We need someone more familiar with make to figure it out. I imagine the problem is related to the unbalanced parens.
Re: Is this a bug?
No crash on Ubuntu 13.10 x86_64 using the dmd 2.064.2 package downloaded from dlang.org.
Re: endsWith: wrong function call, no error
On Monday, 21 October 2013 at 15:18:18 UTC, monarch_dodra wrote: It's a feature. I actually like that feature. It's me compose long strings in an easily viewable way without having to use concatenation and therefore additional allocation. Or, even to just comment on indvidual lines string command = /usr/bin/rm -rf / // Don't worry, it'll be fine... /dev/null 2/dev/null // This way nobody will know about it.
Re: endsWith: wrong function call, no error
On Monday, 21 October 2013 at 15:57:14 UTC, David Nadlinger wrote: Concatenation of string literals doesn't need to allocate, as discussed here: http://d.puremagic.com/issues/show_bug.cgi?id=3827. It's trivial to handle the cases where you would've written string1 string2 instead of string1 ~ string2. Once overloaded operators come into play, it's a bit trickier, but if this case really occurred in your program, you could always add a pair of parens to fix it. See also this post by Walter: http://forum.dlang.org/post/ibi742$gi2$1...@digitalmars.com Thanks for pointing that out. I've changed my stance then. It's causing difficult to find bugs and serves no useful purpose so it should go. But since the thread you linked to is three years old it is apparently already decided and merely waiting implementation.
Re: I don't like slices in D
On Thursday, 17 October 2013 at 18:00:20 UTC, Vitali wrote:
I expected slices to be in D (http://dlang.org/arrays.html)
like they are in Go
(http://blog.golang.org/go-slices-usage-and-internals). But
they are not.
Why the array have to be reallocated after the length of a
slice is changed? It makes slices useless.
Here a little example (it fails):
void testSlices() {
int[] dArr = [10, 11, 12];
int[] dSlice = dArr[0..2];
dSlice.length++;
assert(dArr[2]==dSlice[2]); // failure
}
Change your slice to
int[] dSlice = dArr[0..$] or [0..3];
The way you are doing it only takes the first 2 elements.
Modified code:
import std.stdio : writeln;
void main()
{
int[] dArr = [10, 11, 12];
int[] dSlice = dArr[0..$];
assert(dArr[2] is dSlice[2]); // passes
dSlice.length++;
assert(dArr[2] == dSlice[2]); // passes
}
Re: [OT] Which IDE / Editor do you use?
On Saturday, 21 September 2013 at 01:05:02 UTC, Manu wrote: I wish the rest of us could say the same. We're a pathetic patsy nation that just does whatever the yanks tell us to. But we're suckers for Aussie and English accents. We'll be so distracted by how you sound that we won't pay attention to what you say. Yank 1: Did he just ask us to put our military under their generals? Yank 2: Did you hear they way he said today you will serve us? That was awesome! This guy's great, we should do whatever he wants!
Re: Had another 48hr game jam this weekend...
On Wednesday, 18 September 2013 at 15:43:21 UTC, Manu wrote: I've had lots of problems in the past where a header included by another header doesn't prompt the dependent code to be rebuilt, and I ended up in a conservative state of rebuild-all-ing every time... :/ Maybe I should try working with that environment more... This is what makes tup so interesting to me. It tracks every file that is read in during a compile so it knows what to recompile when a particular header changes.
Re: Rust Code in the Wild
I've briefly looked at Rust and so far the pointer ownership system is the only thing that appeals to me. If that could be somehow integrated in D it would be great. If I recall, a similar system was proposed for D by Bartosz Milewski.
Re: Why UTF-8/16 character encodings?
On Tuesday, 28 May 2013 at 01:38:22 UTC, Peter Williams wrote: So you're going to spell check them all to make sure that they're English? Or did you mean ASCII? Peter That's it. I'm filing a bug against std.traits. There's a unittest there that with a struct named Colour. Completely unacceptable.
Re: std.variant holding bigger structs and std.concurrency message limitation
On Saturday, 27 April 2013 at 17:42:54 UTC, Idan Arye wrote: The way it works now, is that if the size is too big they use a reference instead: https://github.com/D-Programming-Language/phobos/blob/master/std/variant.d#L544#L555 So is the bug in std.concurrency and they way it uses Variant or is the bug in Variant?
Re: dmd goes epic
Bah - somehow this turned into a browser thread let's get back to the fact that this is the best git commit log viewer ever!
Re: D 1.076 and 2.061 release
On Wednesday, 2 January 2013 at 08:20:41 UTC, Jonathan M Davis wrote: On Wednesday, January 02, 2013 09:12:49 bearophile wrote: I have to warn people that if they want to suddenly switch from 2.060 to 2.061 with no intermediate steps, probably some of their code will break, and they will have to work to fix it. Why? - Jonathan M davis I have noticed my project doesn't compile with 2.061 when it did with 2.060. I am using a few different static libraries, one of them is thrift. I had to recompile the libraries I use with 2.061 which meant I had to rebuild thrift and the thrift generated libraries. Once I did that I could compile just fine. But before that I got the errors below. I am on 64-bit Ubuntu (AMD64). /persist/apps/lib/libthriftd.a(base_1_403.o): In function `_D6thrift4base10TException6__ctorMFAyaAyamC6object9ThrowableZC6thrift4base10TException': src/thrift/base.d:(.text._D6thrift4base10TException6__ctorMFAyaAyamC6object9ThrowableZC6thrift4base10TException+0x31): undefined reference to `_D6object9Exception6__ctorMFAyaAyamC6object9ThrowableZC9Exception' /persist/apps/lib/libthriftd.a(format_19a_f6c.o): In function `_D3std6format62__T11formatRangeTS3std5array16__T8AppenderTAaZ8AppenderTAyaTaZ11formatRangeFKS3std5array16__T8AppenderTAaZ8AppenderKAyaKS3std6format18__T10FormatSpecTaZ10FormatSpecZv': /persist/apps/dmd/linux/bin64/../../src/phobos/std/format.d:(.text._D3std6format62__T11formatRangeTS3std5array16__T8AppenderTAaZ8AppenderTAyaTaZ11formatRangeFKS3std5array16__T8AppenderTAaZ8AppenderKAyaKS3std6format18__T10FormatSpecTaZ10FormatSpecZv+0x519): undefined reference to `_D6object9Exception6__ctorMFAyaAyamC6object9ThrowableZC9Exception' /persist/apps/lib/libthriftd.a(format_518_1094.o): In function `_D3std6format81__T11formatRangeTS3std5array17__T8AppenderTAyaZ8AppenderTAC3std6socket7AddressTaZ11formatRangeFKS3std5array17__T8AppenderTAyaZ8AppenderKAC3std6socket7AddressKS3std6format18__T10FormatSpecTaZ10FormatSpecZv': /persist/apps/dmd/linux/bin64/../../src/phobos/std/format.d:(.text._D3std6format81__T11formatRangeTS3std5array17__T8AppenderTAyaZ8AppenderTAC3std6socket7AddressTaZ11formatRangeFKS3std5array17__T8AppenderTAyaZ8AppenderKAC3std6socket7AddressKS3std6format18__T10FormatSpecTaZ10FormatSpecZv+0x370): undefined reference to `_D6object9Exception6__ctorMFAyaAyamC6object9ThrowableZC9Exception' /persist/apps/lib/libthriftd.a(format_528_117d.o): In function `_D3std6format72__T11formatRangeTS3std5array17__T8AppenderTAyaZ8AppenderTAC9ExceptionTaZ11formatRangeFKS3std5array17__T8AppenderTAyaZ8AppenderKAC9ExceptionKS3std6format18__T10FormatSpecTaZ10FormatSpecZv': /persist/apps/dmd/linux/bin64/../../src/phobos/std/format.d:(.text._D3std6format72__T11formatRangeTS3std5array17__T8AppenderTAyaZ8AppenderTAC9ExceptionTaZ11formatRangeFKS3std5array17__T8AppenderTAyaZ8AppenderKAC9ExceptionKS3std6format18__T10FormatSpecTaZ10FormatSpecZv+0x370): undefined reference to `_D6object9Exception6__ctorMFAyaAyamC6object9ThrowableZC9Exception' /persist/apps/lib/libthriftd.a(format_555_f95.o): In function `_D3std6format327__T11formatRangeTS3std5array17__T8AppenderTAyaZ8AppenderTS3std9algorithm235__T6joinerTS3std9algorithm191__T9MapResultS1123std10functional85__T8unaryFunVAyaa32_7465787428612e5f302c20603a2022602c20612e5f312e6d73672c2060226029Z8unaryFunTS3std5range43__T3ZipTAC3std6socket7AddressTAC9ExceptionZ3ZipZ9MapResultTAyaZ6joiner6ResultTaZ11formatRangeFKS3std5array17__T8AppenderTAyaZ8AppenderKS3std9algorithm235__T6joinerTS3std9algorithm191__T9MapResultS1123std10functional85__T8unaryFunVAyaa32_7465787428612e5f302c20603a2022602c20612e5f312e6d73672c2060226029Z8unaryFunTS3std5range43__T3ZipTAC3std6socket7AddressTAC9ExceptionZ3ZipZ9MapResultTAyaZ6joinerFS3std9algorithm191__T9MapResultS1123std10functional85__T8unaryFunVAyaa32_7465787428612e5f302c20603a2022602c20612e5f312e6d73672c2060226029Z8unaryFunTS3std5range43__T3ZipTAC3std6socket7AddressTAC9ExceptionZ3ZipZ9MapResultAyaZS3std9algorithm235__T6joinerTS3std9algorithm191__T9MapResultS1123std10functional85__T8unaryFunVAyaa32_7465! 787428612e5f302c20603a2022602c20612e5f312e6d73672c2060226029Z8unaryFunTS3std5range43__T3ZipTAC3std6socket7AddressTAC9ExceptionZ3ZipZ9MapResultTAyaZ6joiner6Result6ResultKS3std6format18__T10FormatSpecTaZ10FormatSpecZv':
Re: std.net.curl - HTTP.Method.options - perform()
On Tuesday, 24 July 2012 at 16:45:49 UTC, Alex wrote:
Hello!
Why does this code print output when I run it?
- It only happens when the HTTP response Code is == 405
- 173.194.69.94 is a Google Server for testing
- Are there any default callbacks which make this output?
CODE:
http://pastebin.com/CZP86Gwh
OUTPUT:
http://pastebin.com/AkA3Fvw1 (Basically a HTML error page)
--Alex
There must be a default onReceive that is writing that to stdout.
If I add this line just before the perform() call the output is
not generated:
http.onReceive = (ubyte[] data) { /+ drop +/ return data.length;
};
-David
Re: D in the cloud with cassandra ?
On Thursday, 28 June 2012 at 05:42:52 UTC, David Nadlinger wrote: On Thursday, 28 June 2012 at 00:33:28 UTC, Knud Soerensen wrote: I am also planing to use a column store as Apache's Cassandra have anyone tried it with D ? As far as I know, the »low-level« Cassandra API is based on Thrift. This means that you should be able to get started pretty easily, as there is a D implementation of it. It has been included in the official repository trunk – give me a shout if something doesn't work. David I've been using the D support in Thrift in the official repository in my database testing. I've had no trouble using Thrift in D to talk to Cassandra and Hbase. It's quite straightforward and easy to do. The one thing I've had to change is when Thrift names a variable version. Since that's a keyword in D I just go in a rename it in the generated D sources.
Re: dereferencing null - what about something like an check-scope?
I like the way Scala handles this with the Option class. None indicates no value which is equivalent to your null sentinal value but it is a value itself so it is always safe to use. Combined with pattern matching and the orElse methods makes it very easy to use one variable that both stores the value and at the same time indicates whether it is valid or not. It's not two variables that could get out of sync.
Re: Calling a C++ Object from D
On Tue, 24 Jan 2012 07:22:46 -0600, Richard Webb we...@beardmouse.org.uk
wrote:
How about something like this (using Juno):
///
import juno.com.core, std.stdio;
abstract final class SystemInformation {
mixin(uuid(C01B9BA0-BEA7-41BA-B604-D0A36F469133));
mixin Interfaces!(ISystemInformation);
}
interface ISystemInformation : IDispatch
{
mixin(uuid(ade87bf7-7b56-4275-8fab-b9b0e591844b));
int get_OemHardwareSupportLink(wchar* retval);
int get_RebootRequired(out VARIANT_BOOL retval);
};
void main()
{
//auto systemInformation =
coCreate!(ISystemInformation)(uuidof!(SystemInformation));
auto systemInformation = SystemInformation.coCreate!ISystemInformation;
if (systemInformation !is null)
{
scope(exit) tryRelease(systemInformation);
VARIANT_BOOL b;
int result = systemInformation.get_RebootRequired(b);
if (SUCCEEDED(result))
{
writefln(Reboot Required: %s, b);
}
}
}
///
Thank you very much. This works great.
Yes, it turns out I was mistaken and this is COM and not C++. Juno
definitely helps here. I cloned it from github and was glad to see that
work had recently been done on Juno as well.
-Dave
Calling a C++ Object from D
I'm trying to understand how to call a C++ library from D. Specifically, the Windows Update API. My goal is rather simple in that I want to detect whether there is a reboot pending for the system. To do that I need to call the ISystemInformation::RebootRequired property but I don't know how to do that in D. Information about the call is at http://msdn.microsoft.com/en-us/library/aa386098(v=vs.85).aspx. I have the C++ header and have successfully defined VARIANT_BOOL, VARIANT_TRUE, and VARIANT_FALSE. The last bit to do is to define the ISystemInterface object itself and the RebootRequired method. How do I do that? -Dave
Re: Java Scala
Andrei Alexandrescu seewebsiteforem...@erdani.org wrote in message news:jb8hvh$2sdl$1...@digitalmars.com... This is a good benchmark for I/O and a practical regex. David, could you please send (privately if you want) the file or some statistics about it (bytes, lines, a representative sample)? Thanks! One more thing before I forget - you may want to use byLine() for input. In case the issue turns out to be related to I/O, it's much better we improve byLine() instead of the streams library. I implemented the various suggestions (File.byLine, writeln instead of writefln, std.algorithm.sort, except using FReD. FReD wouldn't compile on the linux box I am using. the error was: /phobos/std/file.d(537): Error: undefined identifier package c.stdio Previous timing: real4m21.255s user4m14.216s sys 0m5.940s New timing after the changes: real2m15.840s user2m12.700s sys 0m2.760s So, it's nearly twice as fast but still the slowest of the four. I was able to compile with FReD on a 32-bit Windows system and it performed 15% faster than std.regex processing these same test files. I would love to try the precompiled regex code for FReD but the compile throws an out of memory error when I try it. The source files are /var/log/syslog files from sendmail on a Solaris 10 box. I can't make them available because they are mail logs from our company but here are the sizes and line counts along with example entries. $ wc -l syslog syslog.0 syslog.1 syslog.2 280618 syslog 331609 syslog.0 535035 syslog.1 543241 syslog.2 1690503 total -rw-r--r-- 1 david david 86244537 2011-11-30 21:26 syslog.0 -rw-r--r-- 1 david david 146156778 2011-11-30 21:26 syslog.1 -rw-r--r-- 1 david david 143481904 2011-11-30 21:26 syslog.2 -rw-r--r-- 1 david david 73030898 2011-11-30 21:26 syslog The entries look like this: Oct 27 03:10:01 thehost sendmail[3248]: [ID 801593 mail.info] p9R8A0MJ003245: to=u...@somewhere.com, delay=00:00:01, xdelay=00:00:01, mailer=esmtp, pri=120773, relay=some.host.com. [5.6.7.8], dsn=2.0.0, stat=Sent (ok 1319703001 qp 25319 the.mail.host.com!1319703000!80184558!1) Oct 27 03:10:04 thehost sendmail[3289]: [ID 801593 mail.info] p9R8A3Nr003289: from=sender@senderbox, size=765, class=0, nrcpts=1, msgid=201110270810.p9R8A3QA021419@senderbox, proto=ESMTP, daemon=MTA, relay=senderbox.foo.com [1.2.3.4] -Dave relayhosts.d Description: Binary data
Re: Java Scala
Recently I needed to analyze some mail logs. I needed to find the hosts that were sending mail and how many lines in the log existed for each host. Thinking this would be perfect for natively compiled code in D I first wrote a D app. I then wrote it in perl and was amazed at how much faster perl was. I expanded out to Java and Scala. For all four I used the same source files and the same output was created. The four source files totalled 430MB together with 1.69 million lines. In all four implementations the file was read a line at a time and the same regex was applied to extract the desired data. Output was 6,857 bytes. Here are the run results on a 32-bit linux 3.0.0 system. The absolute numbers are not important since I ran this on a very old system. It is the relative numbers that matter here. Java (JVM 7 update 1) real0m56.465s user0m51.911s sys 0m3.344s Perl (5.12.4) real1m22.256s user1m19.773s sys 0m2.212s Scala (2.9.1 on JVM 7 update 1) real1m41.187s user1m36.566s sys 0m3.892s D (2.0.56 compiled with -O -release -inline -noboundscheck) real4m21.255s user4m14.216s sys 0m5.940s Java is the fastest, even faster than perl. The D version which is the only natively compiled code version is over 4.6 times slower than the Java version even when including overhead like the JVM startup time. The source for each of the four implementations is attached. I admit to being very new to D so perhaps I'm really doing something wrong. bearophile bearophileh...@lycos.com wrote in message news:jb6j8h$12js$1...@digitalmars.com... Jude: Got any ideas for code that is currently way less than optimal in D? Compared to Java running on the OracleVM D is most times slower when it comes to heavily garbage collected code, and often with floating-point-heavy code. Exceptions (and synchronized methods) are faster than D-DMD ones. Sometimes textual I/O is faster in Java compared to D-DMD-Phobos one. Often the JavaVM is able to de-virtualize and inline virtual calls, while D-DMD is not able to do this (maybe LDC2-LLVM3 will be able to do this a bit), making such code faster. The JavaVM is usually able to dynamically unrool loops that have a loop count known only at runtime, this sometimes speeds up loops a lot compared to D-DMD. Some of Java libraries implement important data structures or other things that are currently sometimes significantly faster than equivalent D ones. This is probably a not complete list. Bye, bearophile relayhosts.d Description: Binary data RelayHosts.java Description: Binary data relayhosts.pl Description: Binary data RelayHosts.scala Description: Binary data
