The malloc threshold of a Map object, specifically in the context of Golang, refers to the default limit set for the size of keys and values that can be stored within the map. According to the information available, the default limit is set at 128. This can be modified by changing the values of maxKeySize and maxValueSize in the runtime.hashmap[9].
To modify these values, you would typically need to access and alter the Golang runtime code, which involves a deep understanding of the internal workings of Golang's memory management. This is not a common practice for most applications, as it requires maintaining a custom version of the Golang runtime. However, for specialized needs or performance tuning at a very low level, such modifications could be necessary.
Here's a general idea of what the code modification might look like, though it's important to note that directly modifying the Golang runtime is not recommended for general use:
// Hypothetical modification of runtime.hashmap parameters
maxKeySize := 256 // Increasing the maximum key size
maxValueSize := 256 // Increasing the maximum value size
