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595826ad63
5aad635Use memset() to optimize prevector::resize() (Evan Klitzke)e46be25Reduce redundant code of prevector and speed it up (Akio Nakamura)f0e7aa7Add new prevector benchmarks. (Evan Klitzke) Pull request description: This branch optimizes various `prevector` operations, especially resizing vectors. While profiling the `loadblk` thread I noticed that a lot of time was being spent in `prevector::resize()` which led to this work. I have some data here indicating that it takes up **37%** of the time in `ReadBlockFromDisk()`: https://monad.io/readblockfromdisk.svg This branch improves things significantly. For trivial types, the new results for the prevector benchmark are: * `PrevectorClearTrivial` which tests `prevector::clear()` becomes 24.6x faster * `PrevectorDestructorTrivial` which tests `prevector::~prevector()` becomes 20.5x faster * `PrevectorResizeTrivial` which tests `prevector::resize()` becomes 20.3x faster Note that in practice it looks like the prevector is only used to contain `unsigned char` types, which is a trivial type. The benchmarks are testing a bit of an extreme case, but the changes here are motivated by the profiling data for `ReadBlockFromDisk()` I linked to above. The pull request here consists of a series of three commits: * The first adds new benchmarks but does not change the prevector code. * The second is from @AkioNak , and merges some prevector optimizations he submitted in #11988 * The third optimizes `prevector::resize()` to use `memset()` when the prevector contains trivially constructible types Tree-SHA512: 28f7cbb91a19f9f43b6a5942781d7eb2e3197389186b666f086b69df12bee37773140f765426d715bfb8ebff79cb27a5f1206d0325b54b4aa65598b50fb18368
98 lines
2.3 KiB
C++
98 lines
2.3 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2015 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_COMPAT_H
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#define BITCOIN_COMPAT_H
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#if defined(HAVE_CONFIG_H)
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#include "config/dash-config.h"
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#endif
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#include <type_traits>
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// GCC 4.8 is missing some C++11 type_traits,
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// https://www.gnu.org/software/gcc/gcc-5/changes.html
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#if defined(__GNUC__) && __GNUC__ < 5
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#define IS_TRIVIALLY_CONSTRUCTIBLE std::is_trivial
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#else
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#define IS_TRIVIALLY_CONSTRUCTIBLE std::is_trivially_constructible
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#endif
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#ifdef WIN32
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#ifdef _WIN32_WINNT
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#undef _WIN32_WINNT
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#endif
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#define _WIN32_WINNT 0x0501
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#ifndef WIN32_LEAN_AND_MEAN
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#define WIN32_LEAN_AND_MEAN 1
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#endif
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#ifndef NOMINMAX
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#define NOMINMAX
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#endif
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#ifdef FD_SETSIZE
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#undef FD_SETSIZE // prevent redefinition compiler warning
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#endif
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#define FD_SETSIZE 1024 // max number of fds in fd_set
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#include <winsock2.h> // Must be included before mswsock.h and windows.h
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#include <mswsock.h>
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#include <windows.h>
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#include <ws2tcpip.h>
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#else
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#include <sys/fcntl.h>
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#include <sys/mman.h>
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#include <sys/select.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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#include <arpa/inet.h>
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#include <ifaddrs.h>
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#include <limits.h>
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#include <netdb.h>
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#include <unistd.h>
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#endif
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#ifndef WIN32
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typedef unsigned int SOCKET;
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#include "errno.h"
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#define WSAGetLastError() errno
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#define WSAEINVAL EINVAL
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#define WSAEALREADY EALREADY
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#define WSAEWOULDBLOCK EWOULDBLOCK
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#define WSAEMSGSIZE EMSGSIZE
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#define WSAEINTR EINTR
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#define WSAEINPROGRESS EINPROGRESS
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#define WSAEADDRINUSE EADDRINUSE
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#define WSAENOTSOCK EBADF
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#define INVALID_SOCKET (SOCKET)(~0)
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#define SOCKET_ERROR -1
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#endif
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#ifdef WIN32
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#ifndef S_IRUSR
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#define S_IRUSR 0400
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#define S_IWUSR 0200
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#endif
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#else
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#define MAX_PATH 1024
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#endif
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#if HAVE_DECL_STRNLEN == 0
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size_t strnlen( const char *start, size_t max_len);
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#endif // HAVE_DECL_STRNLEN
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bool static inline IsSelectableSocket(const SOCKET& s) {
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#ifdef WIN32
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return true;
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#else
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return (s < FD_SETSIZE);
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#endif
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}
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#endif // BITCOIN_COMPAT_H
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