In programming language compiler optimization theory, escape analysis is a method for determining the dynamic scope of pointers. It is related to pointer analysis and shape analysis.

When a variable (or an object) is allocated in a subroutine, a pointer to the variable can escape to other threads of execution, or to calling subroutines. If a subroutine allocates an object and returns a pointer to it, the object can be accessed from undetermined places in the program — the pointer has "escaped". Pointers can also escape if they are stored in global variables or other data structures that, in turn, escape the current procedure.

Escape analysis determines all the places where a pointer can be stored and whether the lifetime of the pointer can be proven to be restricted only to the current procedure and/or thread.

A compiler can use the results of escape analysis as a basis for optimizations:

In object-oriented programming languages, dynamic compilers are particularly good candidates for performing escape analysis. In traditional static compilation, method overriding can make escape analysis impossible, as any called method might be overridden by a version that allows a pointer to escape. Dynamic compilers can perform escape analysis using the available information on overloading, and re-do the analysis when relevant methods are overridden by dynamic code loading.

Huckleberry "Huck" Finn is a fictional character created by Mark Twain, who first appeared in the book The Adventures of Tom Sawyer and is the protagonist and narrator of its sequel, Adventures of Huckleberry Finn. He is 12 or 13 years old during the former and a year older ("thirteen or fourteen or along there," Chapter 17) at the time of the latter. Huck also narrates Tom Sawyer Abroad and Tom Sawyer, Detective, two shorter sequels to the first two books.

Huck is the son of the town's vagrant drunkard, "Pap" Finn. Sleeping on door-steps when the weather is fair, in empty hogsheads during storms, and living off of what he receives from others, Huck lives the life of a destitute vagabond. The author metaphorically names him "the juvenile pariah of the village." The author describes Huck as "idle, and lawless, and vulgar, and bad," qualities for which he was admired by all the children in the village, although their mothers "cordially hated and dreaded" him.

Huck is an archetypal innocent, able to discover the "right" thing to do despite the prevailing theology and prejudiced mentality of the South of that era. The best example of this is his decision to help Jim escape slavery, even though he believes he will go to hell for it (see Christian views on slavery).

Samuel Langhorne Clemens (November 30, 1835 – April 21, 1910), better known by his pen name Mark Twain, was an American author and humorist. He is most noted for his novels, The Adventures of Tom Sawyer (1876), and its sequel, Adventures of Huckleberry Finn (1885), the latter often called "the Great American Novel."

Twain grew up in Hannibal, Missouri, which would later provide the setting for Huckleberry Finn and Tom Sawyer. He apprenticed with a printer. He also worked as a typesetter and contributed articles to his older brother Orion's newspaper. After toiling as a printer in various cities, he became a master riverboat pilot on the Mississippi River, before heading west to join Orion. He was a failure at gold mining, so he next turned to journalism. While a reporter, he wrote a humorous story, "The Celebrated Jumping Frog of Calaveras County", which became very popular and brought nationwide attention. His travelogues were also well-received. Twain had found his calling.

He achieved great success as a writer and public speaker. His wit and satire earned praise from critics and peers, and he was a friend to presidents, artists, industrialists, and European royalty.