在R中粘贴字符串最有效的方法是什么？

str1 <- "Hello"
str2 <- "World"
result <- paste(str1, str2)
print(result)  # 输出: "Hello World"

str1 <- c("apple", "banana", "cherry")
str2 <- c("red", "yellow", "red")
result <- paste(str1, str2, sep = "-")
print(result)  # 输出: "apple-red" "banana-yellow" "cherry-red"

fruits <- c("apple", "banana", "cherry")
colors <- c("red", "yellow", "red")
result <- paste(fruits, colors, sep = "-", collapse = ", ")
print(result)  # 输出: "apple-red, banana-yellow, cherry-red"

long_string <- paste0(rep("a", 10000), collapse="")
print(nchar(long_string))  # 输出: 10000