[antlr-interest] How to optimize this piece of C/C++ code

[chain one]

void NUEDataManager::ParseOneEntry(const char* entry_start)
{
    p_semi = strchr(entry_start,';');
    assert(p_semi);


    m_input  =
antlr3NewAsciiStringInPlaceStream((pANTLR3_UINT8)entry_start,p_semi-entry_start+1,NULL);
    m_lex    = StepDataEntryLexerNew(m_input);
    m_tokens = antlr3CommonTokenStreamSourceNew(ANTLR3_SIZE_HINT,
TOKENSOURCE(m_lex));
    m_parser = StepDataEntryParserNew(m_tokens);

    m_parser  ->entry(m_parser,id);

    m_parser->free(m_parser);
    m_tokens->free(m_tokens);
    m_lex->free(m_lex);
    m_input->close(m_input);
}


the ParseOneEntry function will be called more than 1000000 times in most
cases.
So I am wondering if it is feasible to get this piece of code improved
further?
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