Reducing waste areas inside strings

A computer system for removing overlap character array of a programming language where a part of the character array is used as a value of a target string, the computer system comprising:

• a memory;
• and
• a processor in communication with the memory, wherein the computer system is configured to:
• compare a character array size of a first string with a character array size of a second string;
• if the character array sizes are different, modify the target string by replacing a larger character array with a smaller character array;
• collect the larger character array in a subsequent string garbage collection (GC) process;
• and
• permit a string object of the target string to be accessed by other threads in parallel such that value and offset fields are atomically accessed and declared private in the string GC process where the larger character array is collected, so that user programs are prevented from accessing the value and offset fields directly.

A non-transitory computer readable storage medium comprising a computer readable program for removing overlap character array of a programming language where a part of the character array is used as a value of a target string, wherein the computer readable program when executed on a computer causes the computer to perform the steps of:

• comparing a character array size of a first string with a character array size of a second string;
• if the character array sizes are different, modifying the target string by replacing a larger character array with a smaller character array;
• collecting the larger character array in a subsequent string garbage collection (GC) process;
• and
• permitting a string object of the target string to be accessed by other threads in parallel such that value and offset fields are atomically accessed and declared private in the string GC process where the larger character array is collected, so that user programs are prevented from accessing the value and offset fields directly.