diff --git a/libs/main/containers/picontainers.cpp b/libs/main/containers/picontainers.cpp
new file mode 100644
index 00000000..f887160a
--- /dev/null
+++ b/libs/main/containers/picontainers.cpp
@@ -0,0 +1,34 @@
+/*
+	PIP - Platform Independent Primitives
+	Base macros for generic containers
+	Ivan Pelipenko peri4ko@yandex.ru
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU Lesser General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU Lesser General Public License for more details.
+
+	You should have received a copy of the GNU Lesser General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "picontainers.h"
+
+
+const ssize_t minAlloc = 64;
+
+
+ssize_t _PIContainerConstantsBase::calcMinCountPoT(ssize_t szof) {
+	ssize_t ret = 0, elc = 1;
+	while (elc * szof < minAlloc) {
+		elc *= 2;
+		++ret;
+	}
+	//printf("calcMinCount sizeof = %d, min_count = %d, pot = %d\n", szof, elc, ret);
+	return ret;
+}
diff --git a/libs/main/containers/picontainers.h b/libs/main/containers/picontainers.h
index 81c3c1a8..c917494a 100644
--- a/libs/main/containers/picontainers.h
+++ b/libs/main/containers/picontainers.h
@@ -63,6 +63,18 @@ private:
 };
 
 
+class PIP_EXPORT _PIContainerConstantsBase {
+public:
+	static ssize_t calcMinCountPoT(ssize_t szof);
+};
+
+template<typename T>
+class _PIContainerConstants {
+public:
+	static ssize_t minCountPoT() {static ssize_t ret = _PIContainerConstantsBase::calcMinCountPoT(sizeof(T)); return ret;}
+};
+
+
 //! \brief
 //! \~english Template reverse wrapper over any container
 //! \~russian Шаблонная функция обертки любого контейнера для обратного доступа через итераторы
diff --git a/libs/main/containers/pideque.h b/libs/main/containers/pideque.h
index 2456a2f4..0dedb90d 100644
--- a/libs/main/containers/pideque.h
+++ b/libs/main/containers/pideque.h
@@ -2280,10 +2280,9 @@ private:
 		if (pid_rsize + pid_rsize >= size_t(s) && pid_rsize < size_t(s)) {
 			return pid_rsize + pid_rsize;
 		}
-		ssize_t t = 0, s_ = s - 1;
-		while (s_ >> t) {
+		ssize_t t = _PIContainerConstants<T>::minCountPoT(), s_ = s - 1;
+		while (s_ >> t)
 			++t;
-		}
 		return (1 << t);
 	}
 	template<typename T1 = T, typename std::enable_if<
diff --git a/libs/main/containers/pivector.h b/libs/main/containers/pivector.h
index 65dda2e5..c9dff3c1 100644
--- a/libs/main/containers/pivector.h
+++ b/libs/main/containers/pivector.h
@@ -2205,8 +2205,9 @@ private:
 		if (piv_rsize + piv_rsize >= s && piv_rsize < s) {
 			return piv_rsize + piv_rsize;
 		}
-		ssize_t t = 0, s_ = s - 1;
-		while (s_ >> t) ++t;
+		ssize_t t = _PIContainerConstants<T>::minCountPoT(), s_ = s - 1;
+		while (s_ >> t)
+			++t;
 		return (1 << t);
 	}
 	template<typename T1 = T, typename std::enable_if<
diff --git a/libs/main/core/piincludes.cpp b/libs/main/core/piincludes.cpp
index 242ba712..1a6482b2 100644
--- a/libs/main/core/piincludes.cpp
+++ b/libs/main/core/piincludes.cpp
@@ -64,10 +64,16 @@ void errorClear() {
 
 PIString errorString() {
 #ifdef WINDOWS
-	char * msg;
+	char * msg = nullptr;
 	int err = GetLastError();
 	FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR)&msg, 0, NULL);
-	return "code " + PIString::fromNumber(err) + " - " + PIString(msg);
+	PIString ret = PIStringAscii("code ") + PIString::fromNumber(err) + PIStringAscii(" - ");
+	if (msg) {
+		ret += PIString::fromSystem(msg).trim();
+		LocalFree(msg);
+	} else
+		ret += '?';
+	return ret;
 #else
 	int e = errno;
 	return PIString("code ") + PIString::fromNumber(e) + " - " + PIString(strerror(e));
diff --git a/libs/main/io_devices/piethernet.cpp b/libs/main/io_devices/piethernet.cpp
index fcf4a00b..77b7f7d4 100644
--- a/libs/main/io_devices/piethernet.cpp
+++ b/libs/main/io_devices/piethernet.cpp
@@ -1001,24 +1001,23 @@ PIEthernet::InterfaceList PIEthernet::interfaces() {
 	ci.index = -1;
 	ci.mtu = 1500;
 #ifdef WINDOWS
-	PIP_ADAPTER_INFO pAdapterInfo, pAdapter = 0;
 	int ret = 0;
 	ulong ulOutBufLen = sizeof(IP_ADAPTER_INFO);
-	pAdapterInfo = (IP_ADAPTER_INFO * ) HeapAlloc(GetProcessHeap(), 0, (sizeof (IP_ADAPTER_INFO)));
-	if (pAdapterInfo == 0) {
-		piCout << "[PIEthernet] Error allocating memory needed to call GetAdaptersinfo";
+	PIP_ADAPTER_INFO pAdapterInfo = (PIP_ADAPTER_INFO)HeapAlloc(GetProcessHeap(), 0, sizeof(IP_ADAPTER_INFO));
+	if (!pAdapterInfo) {
+		piCout << "[PIEthernet] Error allocating memory needed to call GetAdaptersInfo";
 		return il;
 	}
 	if (GetAdaptersInfo(pAdapterInfo, &ulOutBufLen) == ERROR_BUFFER_OVERFLOW) {
-		HeapFree(GetProcessHeap(), 0, (pAdapterInfo));
-		pAdapterInfo = (IP_ADAPTER_INFO *) HeapAlloc(GetProcessHeap(), 0, (ulOutBufLen));
-		if (pAdapterInfo == 0) {
-			piCout << "[PIEthernet] Error allocating memory needed to call GetAdaptersinfo";
+		HeapFree(GetProcessHeap(), 0, pAdapterInfo);
+		pAdapterInfo = (PIP_ADAPTER_INFO)HeapAlloc(GetProcessHeap(), 0, ulOutBufLen);
+		if (!pAdapterInfo) {
+			piCout << "[PIEthernet] Error allocating memory needed to call GetAdaptersInfo";
 			return il;
 		}
 	}
 	if ((ret = GetAdaptersInfo(pAdapterInfo, &ulOutBufLen)) == NO_ERROR) {
-		pAdapter = pAdapterInfo;
+		PIP_ADAPTER_INFO pAdapter = pAdapterInfo;
 		while (pAdapter) {
 			ci.name = PIString(pAdapter->AdapterName);
 			ci.index = pAdapter->Index;
@@ -1031,8 +1030,8 @@ PIEthernet::InterfaceList PIEthernet::interfaces() {
 			IP_ADDR_STRING * as = &(pAdapter->IpAddressList);
 			while (as) {
 //				piCout << "[pAdapter]" << ci.name << PIString(as->IpAddress.String);
-				ci.address = PIString(as->IpAddress.String);
-				ci.netmask = PIString(as->IpMask.String);
+				ci.address = PIStringAscii(as->IpAddress.String);
+				ci.netmask = PIStringAscii(as->IpMask.String);
 				if (ci.address == "0.0.0.0") {
 					as = as->Next;
 					continue;
@@ -1053,7 +1052,7 @@ PIEthernet::InterfaceList PIEthernet::interfaces() {
 		}
 	}
 	if (pAdapterInfo)
-		HeapFree(GetProcessHeap(), 0, (pAdapterInfo));
+		HeapFree(GetProcessHeap(), 0, pAdapterInfo);
 #else
 #ifdef MICRO_PIP
 #else
@@ -1213,10 +1212,16 @@ int PIEthernet::ethErrorCore() {
 
 PIString PIEthernet::ethErrorString() {
 #ifdef WINDOWS
-	char * msg;
+	char * msg = nullptr;
 	int err = WSAGetLastError();
 	FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR)&msg, 0, NULL);
-	return "code " + PIString::fromNumber(err) + " - " + PIString(msg);
+	PIString ret = PIStringAscii("code ") + PIString::fromNumber(err) + PIStringAscii(" - ");
+	if (msg) {
+		ret += PIString::fromSystem(msg).trim();
+		LocalFree(msg);
+	} else
+		ret += '?';
+	return ret;
 #else
 	return errorString();
 #endif
diff --git a/libs/main/system/pisystemmonitor.cpp b/libs/main/system/pisystemmonitor.cpp
index cb1647b1..0efb651d 100644
--- a/libs/main/system/pisystemmonitor.cpp
+++ b/libs/main/system/pisystemmonitor.cpp
@@ -356,6 +356,7 @@ void PISystemMonitor::run() {
 
 void PISystemMonitor::gatherThread(llong id) {
 	PISystemMonitor::ThreadStats ts;
+	if (id == 0) return;
 	ts.id = id;
 #ifdef MICRO_PIP
 	ts.name = tbid.value(id, "<PIThread>");
@@ -386,11 +387,12 @@ void PISystemMonitor::gatherThread(llong id) {
 	PISystemTime ct = PISystemTime::current();
 	FILETIME times[4];
 	HANDLE thdl = OpenThread(THREAD_QUERY_INFORMATION, FALSE, DWORD(id));
-	if (thdl == NULL) {
+	if (!thdl) {
 		piCout << "[PISystemMonitor] gatherThread(" << id << "):: OpenThread() error:" << errorString();
 		return;
 	}
 	if (GetThreadTimes(thdl, &(times[0]), &(times[1]), &(times[2]), &(times[3])) == 0) {
+		CloseHandle(thdl);
 		piCout << "[PISystemMonitor] gatherThread(" << id << "):: GetThreadTimes() error:" << errorString();
 		return;
 	}