The compiler is unable to type-check this expression in reasonable time; try breaking up the expression into distinct sub-expressions

When the compiler is unable to type-check an expression in a reasonable amount of time, it suggests breaking up the expression into distinct sub-expressions. This means dividing the expression into smaller parts that can be type-checked individually. By doing this, the compiler can focus on each sub-expression separately and potentially perform the type-checking more efficiently.

For example, if we have a complex expression like:

var result = (a + b) * (c - d) / (e * f) + (g - h);

We can break it up into smaller sub-expressions:

var sum1 = a + b;
var diff = c - d;
var product = e * f;
var sum2 = g - h;

var result = (sum1 * diff) / (product) + (sum2);

By breaking up the expression, the compiler can now type-check each sub-expression separately, which may result in faster type-checking time