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Improving compression performance (avoiding unnecessary file flush and better handling the 2GB limit)

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git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@6109 212acab6-be3b-0410-9dea-997c60f758d6
This commit is contained in:
wizou 2010-06-17 15:56:42 +00:00
parent 4d19aaa9ab
commit 9d452fc5d1
2 changed files with 6 additions and 5 deletions
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4
Source/mmap.cpp
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@ -336,7 +336,7 @@ void MMapFile::flush(int num)
{
if (m_pView)
#ifdef _WIN32
FlushViewOfFile(m_pView, num);
{} // improving performance by commenting: FlushViewOfFile(m_pView, num);
#else
msync((char *)m_pView, num, MS_SYNC);
#endif
@ -431,6 +431,8 @@ void MMapBuf::resize(int newlen)
if (newlen > m_alloc)
{
m_alloc = newlen + (16 << 20); // add 16mb to top of mapping
if (m_alloc < 0) // we've hit a signed integer overflow
m_alloc = INT_MAX;
m_fm.resize(m_alloc);