Method replace

src/flameGraph.cpp:23–27

class StringUtils {
  public:
    static void replace(std::string& s, char c, const char* replacement, size_t rlen) {
        for (size_t i = 0; (i = s.find(c, i)) != std::string::npos; i += rlen) {
            s.replace(i, 1, replacement, rlen);
        }
    }

    static size_t getCommonPrefix(const std::string& a, const std::string& b) {
        size_t length = a.size() < b.size() ? a.size() : b.size();