Integrating fast_float with Valkey to replace strtod invocation

.github/workflows/ci.yml

@@ -91,7 +91,7 @@ jobs:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
       - name: make
         run: |
-          sudo apt-get update && sudo apt-get install libc6-dev-i386
+          sudo apt-get update && sudo apt-get install libc6-dev-i386 libstdc++-11-dev-i386-cross gcc-multilib g++-multilib
           make -j4 SERVER_CFLAGS='-Werror' 32bit
 
   build-libc-malloc:
@@ -109,7 +109,7 @@ jobs:
 
       - name: make
         run: |
-          dnf -y install epel-release gcc make procps-ng which
+          dnf -y install epel-release gcc gcc-c++ make procps-ng which
           make -j4 SERVER_CFLAGS='-Werror'
 
   format-yaml:

deps/README.md

@@ -6,6 +6,7 @@ should be provided by the operating system.
 * **linenoise** is a readline replacement. It is developed by the same authors of Valkey but is managed as a separated project and updated as needed.
 * **lua** is Lua 5.1 with minor changes for security and additional libraries.
 * **hdr_histogram** Used for per-command latency tracking histograms.
+* **fast_float** is a replacement for strtod to convert strings to floats efficiently. 
 
 How to upgrade the above dependencies
 ===
@@ -105,3 +106,16 @@ We use a customized version based on master branch commit e4448cf6d1cd08fff51981
 2. Copy updated files from newer version onto files in /hdr_histogram.
 3. Apply the changes from 1 above to the updated files.
 
+fast_float 
+---
+The fast_float library provides fast header-only implementations for the C++ from_chars
+functions for `float` and `double` types as well as integer types.  These functions convert ASCII strings representing decimal values (e.g., `1.3e10`) into binary types. We provide exact rounding (including
+round to even). In our experience, these `fast_float` functions many times faster than comparable number-parsing functions from existing C++ standard libraries.
+
+Specifically, `fast_float` provides the following two functions to parse floating-point numbers with a C++17-like syntax (the library itself only requires C++11):
+
+To upgrade the library, 
+1. Check out https://github.com/fastfloat/fast_float/tree/main
+2. cd fast_float 
+3. Invoke "python3 ./script/amalgamate.py --output fast_float.h" 
+4. Copy fast_float.h file to "deps/fast_float/".