Is `std::endl` Really Necessary? A Performance Debate

Unveiling the "endl" Fiasco: Debunking the Myths

In a noteworthy Google Talk by Andrei Alexandrescu, the infamous "endl" fiasco was succinctly mentioned. This term has stirred confusion among programmers, who generally believe endl is a preferred and proper technique for signifying the end of a line and flushing buffer in streams.

Despite this perception, concerns have emerged regarding its potential pitfalls. Some experts believe that blind use of std::endl in place of 'n' for newlines can lead to excessive flushing frequency, negatively impacting program performance.

Traditionally, new C programmers are taught to rely heavily on std::endl, considering it the standard method for inserting newlines into streams. However, experienced programmers often emphasize that such flushing is only necessary or beneficial in specific scenarios.

The debate surrounding std::endl hinges on the argument that its inclusion in the standard is questionable due to its infrequent appropriateness and the minor typing advantage it offers over using 'n' followed by std::flush.

TL;DR

• Excessive use of std::endl can hinder performance due to unnecessary flushing.
• 'n' is a more efficient alternative for newlines, avoiding unnecessary flushing overhead.
• While std::endl has its niche use cases, its widespread overuse in codebases is deemed questionable.
• The term "endl fiasco" highlights the disparity between the perceived utility and actual consequences of std::endl misuse.

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