While conversion from a string into an integer value is feasible with SIMD instructions, this application is unpractical. For typical cases, when a single value is parsed, scalar procedures — like the standard atoi or strtol — are faster than … Read more
Packrat Parsing and Parsing Expression Grammars Introduction Parsing expression grammars (PEGs) are an alternative to context free grammars for formally specifying syntax, and packrat parsers are parsers for PEGs that operate in guaranteed linear time through the use of memoization. … Read more
Introduction At Cantor, our systems must rapidly react to new updates in market data. Market data tends to be very bursty, and we only have a few microseconds to handle a message during these bursts. Unfortunately, these messages tend to … Read more
Submission history From: Daniel Lemire [view email] [v1] Fri, 22 Feb 2019 00:24:01 UTC (960 KB)[v2] Mon, 25 Feb 2019 19:45:23 UTC (642 KB)[v3] Mon, 17 Jun 2019 21:51:55 UTC (962 KB)[v4] Tue, 13 Aug 2019 00:34:45 UTC (1,944 KB)[v5] … Read more
jbr – 2011/02/14 (Happy Valentines Day) Here is some code I’ve written to parse and evaluate formula in an Excel 2008 xml format spreadsheet. I generate some very complex reports in Excel format using perl (XLSX:Excel:Writer Using Perl to get … Read more
An exciting feature just landed in the main branch of the Clang compiler. Using the [[clang::musttail]] or __attribute__((musttail)) statement attributes, you can now get guaranteed tail calls in C, C++, and Objective-C. While tail calls are usually associated with a … Read more
Parsing can become accidentally quadratic because of sscanf · Issue #40 · biojppm/rapidyaml · GitHub {{ message }} Comments This was referenced Feb 12, 2020 You can’t perform that action at this time. You signed in with another tab or … Read more