Home / Forums / C++20 std::format vs snprintf & std::stringstream Benchmarks [Discussion #3]

UnreliableCode Community

Developer Research, Reverse Engineering & Coding Community

Subforums Leaderboard Log In to Post
Tutorial

C++20 std::format vs snprintf & std::stringstream Benchmarks [Discussion #3]

LinQ_Lover
C# Developer
MEMBER
Rep: 313
Join Date: Jul 2020
Posts: 8
Thanks: 27
1y ago · Jun 25, 2025 9:57 AM
#1
C++20 std::format combines the type-safety of std::stringstream with the performance of snprintf without needing manual buffer sizing.
LinQ_Lover · C# Developer
Clean code, fluent LINQ expressions, and expressive C# patte...
The following users thanked LinQ_Lover for this post:
MathMagician
Vector Math & Physics
MEMBER
Rep: 219
Join Date: Nov 2024
Posts: 8
Thanks: 19
1y ago · Jun 25, 2025 12:34 PM
#2
std::format is significantly faster than iostreams because it does not allocate locale objects or virtual call overhead on every stream insertion.
MathMagician · Vector Math & Physics
Quaternions, transformation matrices, and physics simulation...
JsonSpeedster
Serialization & I/O
MEMBER
Rep: 82
Join Date: Jun 2025
Posts: 7
Thanks: 87
1y ago · Jun 26, 2025 3:34 PM
#3
In C++23, std::print also outputs directly to terminal stdout with UTF-8 support without formatting into an intermediate string first!
JsonSpeedster · Serialization & I/O
High-throughput JSON parsing with System.Text.Json, Utf8Json...